Hi,

My client's cart has been working fine for over a year now, and was successfully processing orders up to the 25th September. Over the weekend the site has suddenly stopped processing orders, and the ipn_main_handler.php page is coming back with this error message:

Internal Server Error

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

Please contact the server administrator, root@localhost 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.
As far as I'm aware nothing has been changed on the site, and the vagueness of the message really isn't helping. If I simply view the page without sending any data across I just get a message "Nothing to process. Please return to homepage." The page is http://www.turnerscabin.co.uk/ipn_main_handler.php. I've had a look at the curltester.php page (http://www.turnerscabin.co.uk/extras/curltester.php) and I get the Internal Server Error message again. But cURL is enabled.

Can anyone suggest what is going wrong and how I can fix this?

Thanks in advance