SecurePay XML API Integration

Hi Coders. We have an urgent job that needs to be done. We have a client who has a site that offers 1) online purchasing 2) online membership For the above, the shopping carts, pages, forms etc? have all been coded already, what I need is assistance with integrating it into the payment processing system. Both of the above will need to be integrated into the SecurePay XML API (<[login to view URL]>). The tricky part will most likely be that while the online purchasing side of things is a simple once off monetary purchase that must then tell the website that the order was either a success or not the online membership is an infinite monthly debit of the credit card. If the payment fails or the user cancels the credit card debit then the site will need to be told. The website has been built in HTML/ASP and information is stored in MS SQL databases. The deadline on this is unfortunately 3 days. Any queries just let me know.