500 Internal server Error how to solve?

[design.rays]

I HAVE POSTED MP3 FILES AND SOME OF FILES ERROR WHEN DOWNLOING.
GOT THIS MESSAGE.


The server encountered an unexpected condition which prevented it from fulfilling the request.
The script had an error or it did not produce any output. If there was an error, you should be able to see it in the error log.

[Aleksi "Lex" Kilpinen]

If there was an error, you should be able to see it in the error log. If you have access to your servers error logs, please consult them.
You can post the errors here, and we may be able to help you with them, but without knowing what those errors are, it's a bit hard to do that.