Whenever i log onto a SMP server after standing in spawn or walking around for 20-30 seconds the client crashes, anyone know how 2 fix this.

Whenever this happens a file with a name along the lines of hs_err_pid#### appears on my desktop
Here is copy of the 1 i got the last time this happened:
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x69034b7f, pid=2816, tid=3732
#
# JRE version: 6.0_21-b07
# Java VM: Java HotSpot(TM) Client VM (17.0-b17 mixed mode windows-x86 )
# Problematic frame:
# C  [atioglxx.dll+0x34b7f]
#
# If you would like to submit a bug report, please visit:
#   http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

---------------  T H R E A D  ---------------

Current thread (0x472b2400):  JavaThread "Minecraft main thread" daemon [_thread_in_native, id=3732, stack(0x47b90000,0x47be0000)]

siginfo: ExceptionCode=0xc0000005, writing address 0x00011450

Registers:
EAX=0x00011450, EBX=0x00000000, ECX=0x6a599dd0, EDX=0x41400000
ESP=0x47bdf7ac, EBP=0x00000040, ESI=0x49c831c0, EDI=0x69002180
EIP=0x69034b7f, EFLAGS=0x00010206

Top of Stack: (sp=0x47bdf7ac)
0x47bdf7ac:   6a599dd0 691b5478 6a599dd0 6a599dc0
0x47bdf7bc:   6919eea1 6a806b58 6a806b88 00000002
0x47bdf7cc:   00000000 00000004 49c831c0 49c9dcc0
0x47bdf7dc:   69288814 000c8e28 000022f2 00000018
0x47bdf7ec:   7ffa97c4 47bdf808 5ed1905d 000c88d0
0x47bdf7fc:   57f74420 49c831c0 00000000 47bdf81c
0x47bdf80c:   6a806b58 0000017c 00000002 00000000
0x47bdf81c:   691acc73 690171fc 6a806b88 00010001

Instructions: (pc=0x69034b7f)
0x69034b6f:   86 80 00 03 00 c1 e0 04 03 c1 8b 4c 24 08 8b 11
0x69034b7f:   89 10 8b 51 04 89 50 04 8b 49 08 89 48 08 d9 86

Stack: [0x47b90000,0x47be0000],  sp=0x47bdf7ac,  free space=13d47bdf2e0k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [atioglxx.dll+0x34b7f]

[error occurred during error reporting (printing native stack), id 0xc0000005]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J  org.lwjgl.opengl.GL11.nglEndList(J)V
J  bj.a()V
j  e.a(Ldg;Z)Z+119
j  if.c(F)V+257
j  if.b(F)V+208
j  net.minecraft.client.Minecraft.run()V+280
j  java.lang.Thread.run()V+11
v  ~StubRoutines::call_stub

---------------  P R O C E S S  ---------------

Java Threads: ( => current thread )
  0x47245400 JavaThread "Client write thread" daemon [_thread_blocked, id=1072, stack(0x47800000,0x47850000)]
  0x47248400 JavaThread "Client read thread" daemon [_thread_in_native, id=1084, stack(0x477b0000,0x47800000)]
  0x472be400 JavaThread "Thread-10" daemon [_thread_blocked, id=4068, stack(0x58f60000,0x58fb0000)]
  0x580aa800 JavaThread "Thread-9" daemon [_thread_blocked, id=2712, stack(0x58f10000,0x58f60000)]
  0x58090400 JavaThread "Thread-8" daemon [_thread_in_native, id=132, stack(0x58ec0000,0x58f10000)]
=>0x472b2400 JavaThread "Minecraft main thread" daemon [_thread_in_native, id=3732, stack(0x47b90000,0x47be0000)]
  0x47259400 JavaThread "Timer hack thread" daemon [_thread_blocked, id=3728, stack(0x479a0000,0x479f0000)]
  0x003a6800 JavaThread "DestroyJavaVM" [_thread_blocked, id=2876, stack(0x009c0000,0x00a10000)]
  0x46f2e400 JavaThread "AWT-EventQueue-0" [_thread_blocked, id=3488, stack(0x475d0000,0x47620000)]
  0x472b8400 JavaThread "AWT-Shutdown" [_thread_blocked, id=3484, stack(0x47580000,0x475d0000)]
  0x47237400 JavaThread "AWT-Windows" daemon [_thread_in_native, id=3300, stack(0x474f0000,0x47540000)]
  0x4721dc00 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=3280, stack(0x47450000,0x474a0000)]
  0x46edf000 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=3080, stack(0x47130000,0x47180000)]
  0x46ed8c00 JavaThread "CompilerThread0" daemon [_thread_blocked, id=3076, stack(0x470e0000,0x47130000)]
  0x46ed7000 JavaThread "Attach Listener" daemon [_thread_blocked, id=3072, stack(0x47090000,0x470e0000)]
  0x46ed5c00 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=3068, stack(0x47040000,0x47090000)]
  0x46ec8000 JavaThread "Finalizer" daemon [_thread_blocked, id=3036, stack(0x46ff0000,0x47040000)]
  0x46ec3400 JavaThread "Reference Handler" daemon [_thread_blocked, id=3032, stack(0x46fa0000,0x46ff0000)]

Other Threads:
  0x46ec0800 VMThread [stack: 0x46f50000,0x46fa0000] [id=3024]
  0x46ee1400 WatcherThread [stack: 0x47180000,0x471d0000] [id=3084]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
 def new generation   total 157376K, used 103580K [0x02a90000, 0x0d550000, 0x17fe0000)
  eden space 139904K,  74% used [0x02a90000, 0x08fb7378, 0x0b330000)
  from space 17472K,   0% used [0x0b330000, 0x0b330000, 0x0c440000)
  to   space 17472K,   0% used [0x0c440000, 0x0c440000, 0x0d550000)
 tenured generation   total 349568K, used 14028K [0x17fe0000, 0x2d540000, 0x42a90000)
   the space 349568K,   4% used [0x17fe0000, 0x18d93058, 0x18d93200, 0x2d540000)
 compacting perm gen  total 12288K, used 10635K [0x42a90000, 0x43690000, 0x46a90000)
   the space 12288K,  86% used [0x42a90000, 0x434f2f88, 0x434f3000, 0x43690000)
No shared spaces configured.

Dynamic libraries:
0x00400000 - 0x00424000  C:\Program Files\Java\jre6\bin\javaw.exe
0x7c900000 - 0x7c9b2000  C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c8f6000  C:\WINDOWS\system32\kernel32.dll
0x77dd0000 - 0x77e6b000  C:\WINDOWS\system32\ADVAPI32.dll
0x77e70000 - 0x77f02000  C:\WINDOWS\system32\RPCRT4.dll
0x77fe0000 - 0x77ff1000  C:\WINDOWS\system32\Secur32.dll
0x7e410000 - 0x7e4a1000  C:\WINDOWS\system32\USER32.dll
0x77f10000 - 0x77f59000  C:\WINDOWS\system32\GDI32.dll
0x76390000 - 0x763ad000  C:\WINDOWS\system32\IMM32.DLL
0x7c340000 - 0x7c396000  C:\Program Files\Java\jre6\bin\msvcr71.dll
0x6d800000 - 0x6daa7000  C:\Program Files\Java\jre6\bin\client\jvm.dll
0x76b40000 - 0x76b6d000  C:\WINDOWS\system32\WINMM.dll
0x6d7b0000 - 0x6d7bc000  C:\Program Files\Java\jre6\bin\verify.dll
0x6d330000 - 0x6d34f000  C:\Program Files\Java\jre6\bin\java.dll
0x6d290000 - 0x6d298000  C:\Program Files\Java\jre6\bin\hpi.dll
0x76bf0000 - 0x76bfb000  C:\WINDOWS\system32\PSAPI.DLL
0x6d7f0000 - 0x6d7ff000  C:\Program Files\Java\jre6\bin\zip.dll
0x6d000000 - 0x6d14a000  C:\Program Files\Java\jre6\bin\awt.dll
0x73000000 - 0x73026000  C:\WINDOWS\system32\WINSPOOL.DRV
0x77c10000 - 0x77c68000  C:\WINDOWS\system32\msvcrt.dll
0x774e0000 - 0x7761d000  C:\WINDOWS\system32\ole32.dll
0x773d0000 - 0x774d3000  C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\COMCTL32.dll
0x77f60000 - 0x77fd6000  C:\WINDOWS\system32\SHLWAPI.dll
0x5ad70000 - 0x5ada8000  C:\WINDOWS\system32\uxtheme.dll
0x6d230000 - 0x6d284000  C:\Program Files\Java\jre6\bin\fontmanager.dll
0x74720000 - 0x7476c000  C:\WINDOWS\system32\MSCTF.dll
0x755c0000 - 0x755ee000  C:\WINDOWS\system32\msctfime.ime
0x68000000 - 0x68036000  C:\WINDOWS\system32\rsaenh.dll
0x769c0000 - 0x76a74000  C:\WINDOWS\system32\USERENV.dll
0x5b860000 - 0x5b8b5000  C:\WINDOWS\system32\netapi32.dll
0x6d610000 - 0x6d623000  C:\Program Files\Java\jre6\bin\net.dll
0x71ab0000 - 0x71ac7000  C:\WINDOWS\system32\WS2_32.dll
0x71aa0000 - 0x71aa8000  C:\WINDOWS\system32\WS2HELP.dll
0x71a50000 - 0x71a8f000  C:\WINDOWS\System32\mswsock.dll
0x76f20000 - 0x76f47000  C:\WINDOWS\system32\DNSAPI.dll
0x76fb0000 - 0x76fb8000  C:\WINDOWS\System32\winrnr.dll
0x76f60000 - 0x76f8c000  C:\WINDOWS\system32\WLDAP32.dll
0x76fc0000 - 0x76fc6000  C:\WINDOWS\system32\rasadhlp.dll
0x605d0000 - 0x605d9000  C:\WINDOWS\system32\mslbui.dll
0x77120000 - 0x771ab000  C:\WINDOWS\system32\OLEAUT32.DLL
0x6d630000 - 0x6d639000  C:\Program Files\Java\jre6\bin\nio.dll
0x662b0000 - 0x66308000  C:\WINDOWS\system32\hnetcfg.dll
0x71a90000 - 0x71a98000  C:\WINDOWS\System32\wshtcpip.dll
0x47be0000 - 0x47c4b000  C:\Documents and Settings\Harry Shepherd\Application Data\.minecraft\bin\natives\lwjgl.dll
0x5ed00000 - 0x5edcc000  C:\WINDOWS\system32\OPENGL32.dll
0x68b20000 - 0x68b40000  C:\WINDOWS\system32\GLU32.dll
0x73760000 - 0x737ab000  C:\WINDOWS\system32\DDRAW.dll
0x73bc0000 - 0x73bc6000  C:\WINDOWS\system32\DCIMAN32.dll
0x77c00000 - 0x77c08000  C:\WINDOWS\system32\VERSION.dll
0x6d360000 - 0x6d366000  C:\Program Files\Java\jre6\bin\jawt.dll
0x69000000 - 0x693cb000  C:\WINDOWS\system32\atioglxx.dll
0x47910000 - 0x47923000  C:\Documents and Settings\Harry Shepherd\Application Data\.minecraft\bin\natives\jinput-dx8.dll
0x6ce10000 - 0x6ce48000  C:\WINDOWS\system32\DINPUT8.dll
0x688f0000 - 0x688f9000  C:\WINDOWS\system32\HID.DLL
0x77920000 - 0x77a13000  C:\WINDOWS\system32\SETUPAPI.DLL
0x76c30000 - 0x76c5e000  C:\WINDOWS\system32\WINTRUST.dll
0x77a80000 - 0x77b15000  C:\WINDOWS\system32\CRYPT32.dll
0x77b20000 - 0x77b32000  C:\WINDOWS\system32\MSASN1.dll
0x76c90000 - 0x76cb8000  C:\WINDOWS\system32\IMAGEHLP.dll
0x77690000 - 0x776b1000  C:\WINDOWS\system32\NTMARTA.DLL
0x71bf0000 - 0x71c03000  C:\WINDOWS\system32\SAMLIB.dll
0x47970000 - 0x47982000  C:\Documents and Settings\Harry Shepherd\Application Data\.minecraft\bin\natives\jinput-raw.dll
0x58fb0000 - 0x590d9000  C:\Documents and Settings\Harry Shepherd\Application Data\.minecraft\bin\natives\OpenAL32.dll
0x7c9c0000 - 0x7d1d7000  C:\WINDOWS\system32\SHELL32.dll
0x73f10000 - 0x73f6c000  C:\WINDOWS\system32\dsound.dll
0x72d20000 - 0x72d29000  C:\WINDOWS\system32\wdmaud.drv
0x72d10000 - 0x72d18000  C:\WINDOWS\system32\msacm32.drv
0x77be0000 - 0x77bf5000  C:\WINDOWS\system32\MSACM32.dll
0x77bd0000 - 0x77bd7000  C:\WINDOWS\system32\midimap.dll
0x73ee0000 - 0x73ee4000  C:\WINDOWS\system32\KsUser.dll

VM Arguments:
jvm_args: -Xms512m -Xmx1024m
java_command: C:\Documents and Settings\Harry Shepherd\Desktop\Minecraft.exe
Launcher Type: SUN_STANDARD

Environment Variables:
PATH=C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\ATI Technologies\ATI Control Panel;C:\Program Files\Java\jre6\bin
USERNAME=Harry Shepherd
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 15 Model 2 Stepping 9, GenuineIntel

---------------  S Y S T E M  ---------------

OS: Windows XP Build 2600 Service Pack 3

CPU:total 1 (1 cores per cpu, 1 threads per core) family 15 model 2 stepping 9, cmov, cx8, fxsr, mmx, sse, sse2

Memory: 4k page, physical 261460k(4172k free), swap 1026076k(6388k free)

vm_info: Java HotSpot(TM) Client VM (17.0-b17) for windows-x86 JRE (1.6.0_21-b07), built on Jul 17 2010 01:10:15 by "java_re" with MS VC++ 7.1 (VS2003)

time: Thu Aug 12 16:19:01 2010
elapsed time: 218 seconds