In my experience, the 500 error is normally down to some php error which the browser can't pinpoint.
Could you post your index.php script which is in the wheels folder, please?
BTW it's best to close off your url with a "/" - avantgardecares.com/wheel/
Could you post your index.php script which is in the wheels folder, please?
BTW it's best to close off your url with a "/" - avantgardecares.com/wheel/