Posting Data From .aspx to WorldPay

Hi,

I am writing a script that requires two actions performed on the same page;
1) upload pictures and store them on the server & 2) Send all of the
variables from the WebForm to the WorldPay servers via the POST method. I am
aware of the Server.Transfer and Response.Redirect methods but neither of
these will do what I want.

Are there any soluitions out there in C# that I can used to do this easily
(running out of time on this project!)?

Thanks for your help.