Connection to Merchant Gateway

This project would be a simple interface to connect to our Merchant Gateway which is USAePay. We would like to have a form that collects information needed for Credit Card processing. i.e. Name, Address, Credit Card Number, Security Code, etc. Then we would need it to send that information to USAePay and authorize the card. The results would then have to be returned so that we would know what to do with the sale. We would also need a form, or even comments in the code that we could use to enter the credentials from USAePay. We do not want to give out that information for obvious reasons. This project will have to be done in either Classic ASP or ASP.Net and will be expected to be completed within 3 days of acceptance.