WordPress Blog problem(repost)

When I do anything in my wordpress blog I get a 500 Internal Server Error. I need help fixing this problem This is the Error # Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, webmaster@[login to view URL] and inform them of the time the error occurred, and anything you might have done that may have caused the error. More information about this error may be available in the server error log. Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request. * * * Apache/1.3.37 Server at [login to view URL] Port 80