Windows .exe Game Crash When Entering Nether Please Help

[thetravis0916]

I am on a server Mindcrack version. And when i enter the nether my game crashes but not the server i have tried resetting the settings and reinstalling java. i have optifine installed on it. but the weird thing is the nether works on my other computer. I added the log file.
But i think the problem is this part:

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000000000000, pid=11144, tid=10460
#
# JRE version: 6.0_31-b05
# Java VM: Java HotSpot(TM) 64-Bit Server VM (20.6-b01 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C  0x0000000000000000

 

[Nessiroj]

Hard to say what the cause is with the crashlog. Do you have any other logs on your client that you could upload (like the console log / console itself) maybe we can see what happends just before it crashes.