500 Internal Server Error.

Hi all, I've this problem when I use a script. 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, postmaster@automationsoft.biz 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. I've controlled all the script but I don't find the problem.For a real time test this is the url: www.automationsoft.biz/crivello.php can anyone help me about this questions? Thanks in advance Francesco francesco@automationsoft.biz