fix required for configure.php in oscommerce

Quick Fix required in [login to view URL] for Oscommerce on-line shop. Problem: Everything in the shopping processs works as required with the exception of the last step in the order process, when the user completes the order. when user clicks continue button on page: [login to view URL] instead of being directed back to /shop/[login to view URL] a "Not Found error message appears" as follows: Page error = "The requested URL /shop//shop/[login to view URL] was not found on this server." so I think there is an error in [login to view URL] file which is causing this? Need someone to investigate make changes and test, to get it working. PS: it's a quick job so keep your bids <$40. :) thanks doug