I have Problems Please Help me.

I add to cart then go to check out but there’s and error please see this page

https://secure-3.com/paradepeople/store/shopping-cart/shipping/

or this message

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@tapestcontrol.262racine.net 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 Server at secure-3.com Port 443

Please get me in touch about this problem because i need to work it as soon as possible.

Best Regards,

Jennifer