[HELP]World Server Keeps Crashing

[marsata]

Is it something from the server files or someone is crashing it??
This is in the error.txt

Spoiler:

2010/10/16 12:04:46 rCnt=1

WorldServerNo_MapKey.exe caused an EXCEPTION_ACCESS_VIOLATION in module WorldServerNo_MapKey.exe at 001B:00486D00

- Registers

EAX=00000000 EBX=00000004 ECX=FFFFFFFF EDX=02807C7E ESI=02807C2C
EDI=00000004 EBP=00000004 ESP=02807BF8 EIP=00486D00 FLG=00010246
CS=001B DS=0023 SS=0023 ES=0023 FS=003B GS=0000

001B:00486D00 (0x00000000 0x00000000 0x00000000 0x00000000) WorldServerNo_MapKey.exe

If someone is crashing it could you recomend me a good anticrash program??

[MentaL]