[Calgon]

Click "Report Crash", also try pasting the error message here for a member of the SA:MP staff to analyse.

There are many possible reasons behind you crashing, and with the little information included, I'm unable to help you, but I may have some valuable advice/tips:

Try re-install SA:MP (re-download the latest SA:MP client version)
If this problem still persists; try re-installing single-player.