Well, I quess i downgraded to 1.0, but i will check more cearful this time.
If your using Vista then set the compability of GTA SA.exe to windows XP SP2.
do this by
Locate GTA_SA.exe, right click on it and click on "properties', then navigate to the "Compability" tab and set to Windows XP SP2. Apply changes and close the window.
You may also try out a No-CD Patch, wich allows you to play without CD, these patches only work with the LEGAL version of GTA..