Screen freezing.

When i log onto the server and play for a while the screen just freezes and i have to use ALT+CTRL+DEL to exit the game which is extremely frustrating. Any suggestion would be a great help.

Remove s0beit mod.
Lol just kiddin'.
Reinstall your game ;D

I had this too, it was because of too many mods.. re-installing or replacing the gta3.img with a fresh one did the trick.

Probably cause you did a mistake with some mod, like forgot to change a .txd or .dff file. For example, I had this problem with the FYB leader skin, as soon as I went past it in skin selection, or saw someone with it in-game, my screen froze too. TRy and go through the entire skin selection to see which modded skin might cause you trouble(at which skin the game freezes). If it is a vehicle problem, it might take longer to find all the vehicles on the server, so it would be easier to reinstall GTA.

I tired reinstalling and downloading the original gta3.img file but for some strange reason i still have the mods.

You have to put it where the GTA3.img is, in the MODELS file foo, if you did that, then for full re-install of the game, delete the GTA User Files thing (Where you have your photos IG and the User Track music and all that shit), then un-install the game, re-install and you'll start out but without the mods.

Re-Install GTA SA,SA-MP and remove San Adreas folder from your PC and then install it

I give up.
I've tryed everything you guys said.
Nothing worked.
The fucking mods just keep haunting me.

I had this problem 4 weeks ago :S i reinstalled my Windows just for working GTA...and it worked

Reinstall your Windows or get a new computer.

Okay i fixed it. Can be locked now.