[PeterJane]

1) SA-MP version
2) Windows version
3) Video card type
4) IP:Port (if any) of the server you are trying to play on
5) If you are crashing, paste the crash report in your post and say when the crash occurs
6) If you are crashing loading SA-MP, please say whether GTA:SA single player works (test it)
7) Do you have any other GTA:SA mods installed? e.g. new vehicles

1) 0.37
2) Windows 7 Ultimate x86
3) PCI-E 2.0
4) N/A
5) N/A
6) N/A
7) N/A

This just happened randomly. I've already checked permissions, reseted, etc. Still this is happening.

EDIT:

Problem solved... I had a backup of GTA San Andreas with SA-MP installed :O

I uninstalled both, deleted the copy and documents, and cleaned the registry. It's working now.