I keep on getting the java.lang.illegal argument exception: comparison method violates its general contract! error when joining certain worlds in the server i go to.

C:\World of Minecraft>java -version
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b05)
Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode)

C:\World of Minecraft>java -D32 -jar World of Minecraft.exe
Constructor for World of Minecraft : java.net.URLClassLoader@70f9f9d8
Compass initialized
Exception in thread "Thread-5" java.lang.UnsatisfiedLinkError: C:\World of Minecraft\native\wi
dows\lwjgl.dll: Can't load IA 32-bit .dll on a AMD 64-bit platform
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.load0(Unknown Source)
at java.lang.System.load(Unknown Source)
at org.lwjgl.Sys$1.run(Sys.java:69)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:65)
at org.lwjgl.Sys.loadLibrary(Sys.java:81)
at org.lwjgl.Sys.<clinit>(Sys.java:98)
at org.lwjgl.opengl.Display.<clinit>(Display.java:129)
at com.mojang.minecraft.l.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)