1)Make sure that you own game version 1.2 2)Disable any antivirus system 3)If you own Windows Vista, run it under WinXP compatibility. Also log in as Admin. 4)Check this out too Link
--------------------------------------------------------------------------- It's time to play the game!
It's possible the mods may have shifted the memory addresses around. I would try removing them and possibly reinstalling the game if you continue to have problems.
Are you using the retail or the Direct2Drive version? That could also be the source of your problems.
--------------------------------------------------------------------------- Chris O'Rorke (chris@cheathappens.com) Co-Founder: Cheat Happens.com