After I send a message to a seller I am presented with a confirmation screen:

Thank you: Your message has been sent to the seller. Return to the item page But when I click on the "Return to the item page" link I get this error: Forbidden You don't have permission to access /cgi-bin/auction/ on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. Apache/1.3.33 Server at www.pricereserved.com Port 80

All files and folders are set to 755 so I don't understand why this error is occurring?

Thank you in advance for any assistance in resolving this matter.