I can get into single player mode just fine but logging on to a server closes the client and gets me this error:

WARNING: Found unknown Windows version: Windows 7
Attempting to use default windows plug-in.
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x695dac3f, pid=3360, tid=4292
#
# JRE version: 6.0_20-b02
# Java VM: Java HotSpot(TM) Client VM (16.3-b01 mixed mode windows-x86 )
# Problematic frame:
# C  [nvoglv32.DLL+0xdac3f]
#
# An error report file with more information is saved as:
# C:\Users\******\Desktop\womclient-1.5.9\hs_err_pid3360.log
#
# 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.
#
ERROR: Failed to run minecraft
JAVA6="C:\Program Files\Java\jre6\bin\java.exe"


So yeah, this has been incredibly annoying for a very long time. I posted this before, way back, but I don't believe anyone had an answer for me. Thanks in advance for, at least, taking a look at this mess.