[sniperwars]

This worked for me and it might work for you:

1) Go to the location of your game:
32 Bit: C:\Program Files\Rockstar Games\GTA San Andreas
64 Bit: C:\Program Files (x86)\Rockstar Games\GTA San Andreas

2) Right click on samp.exe
3) Click on properties
4) Go to the compatibility tab
5) Check the box to run it in compatibility mode
6) Select Windows 98/Windows ME
7) Click apply and ok

That should solve it because it solved my problem
Hope it helped