This is really starting to piss me off

MTA will not start Vice City. Nothing pops up when you click "Start Game" but the error sound is heard. I have reinstalled MTA 10 times, reinstalled Vice City 3 times and tried a different torrent download. Nothing WORKS at all.
But I am able to play Vice City single player without any problems at all, but MTA won't let me. I have spent 4-5 hours trying to fix this. :help:
Please find a solution, and thanks in advance.
P.S. Could it conflict with the new graphic card drivers? I am forced to download these drivers since the games are terrible, with like 20fps on Counter-Strike. The new OMEGA drivers for ATI X1300 Graphics Card (PCI) solved the problems and I was able to run Counter-Strike: Source over 40fps with med-high settings.