my warcraft 3 frozen throne keeps crashing!!! i get a fatal error, it says :

This application has encountered a critical error:

FATAL ERROR!

Program: c:\games\warcraft iii\war3.exe
Exception: 0xC0000005 (ACCESS_VIOLATION) at 001B:0043F5CE

The instruction at '0x0043F5CE' referenced memory at '0xEF74D4F4'.
The memory could not be 'read'.

and i dont know how to fix it, does anyone know?? plz help!!!