flash xml and request.form

when sending xml out of a flash movie, it is sent with the POST method. but it is not sent in the regular key=value way, just the url encoded xml is sent...in classic asp i was able to load the xml like: XMLDoc.loadXML(Request.Form) and the xml would be built correctly. in .NET however it gives me an error about how it is a collection class that cannot be coverted to a string. does anyone know a way to read the posted data straight through another way Or maybe a way to load the xml another way??? rob