Exporting CSV, Getting an Internal Error

I need to look at the current CSV file which wont let me export it because im getting an

"Internal Server Error

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

Please contact the server administrator to inform of the time the error occurred and of 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 have CS- Cart loaded on about 8 different sites and never had this much trouble like this before. Any ideas what to look at or check?