CnC GENERALS ZERO HOUR ERROR!!!

Hi

I get this 'a serious error occured..' message after playing cnc generals zero hour for about 30mins and then the game shuts down

So i looked up in ReleaseCrashInfo and it said :

Release Crash at Tue Apr 30 01:44:00 2013 ; Reason Uncaught Exception in GameEngine::update

Last error: Exception is access violation WinMain at 401700 Error code: EXCEPTION_ACCESS_VIOLATION Description: The thread tried to read from or write to a virtual address for which it does not have the appropriate access. Access address:00000064 was read from.

Stack Dump:   <Unknown>(-1) : <Unknown> 0x005D4A13

Details: Register dump... Eip:005D4A13 Esp:0018F9BC Ebp:00000001 Eax:00000000 Ebx:2A8A2D24 Ecx:2A8A2D04 Edx:00000000 Esi:2A8A2D04 Edi:2A8A2D04 EFlags:00210246 CS:0023  SS:002b  DS:002b  ES:002b  FS:0053  GS:002b EIP bytes dump...

Bytes at CS:EIP (005D4A13)  : 8B 4A 64 74 65 83 78 08 17 75 5F 39 8E 98 01 00 00 75 28 8A 86 F4 01 00 00 84 C0 0F 84 D3 01 00

Current stack:

I applied Win XP SP3 in compatibility mode and set 'run as administrator ' to generals.exe in the ZH folder

I use Win7 64x, ram 8gb, gtx460

Anybody help?