mIRC keeps crashing at random times...( while connected to a server )

"Unhandled exception at 0x004edf60 in mirc.exe: 0xC0000005: Access violation reading location 0x00000011."

---> 004EDF60 mov bl,byte ptr [eax]
004EDF62 test bl,bl
004EDF64 jne 004EDEB5
004EDF6A mov byte ptr [ebp],0
004EDF6E pop edi
004EDF6F pop esi

I will reset my machine and try to find the cause...
mIRC Version 6.11

Win Xp Pro Sp 1
P4 2.59ghz
512MB ram