XML Send and Response

Hello, This is a small and urgent project. I need to fix a asp.net (vb) code. Here is what my code does : 1. Takes a single text box input (less than 20 chars) 2. Prepares a XML 3. Send it to one server 4. Parse the response XML. Everything is working good except that – I am getting response XML saying it document is not valid. When I send exact same XML externally, it works good. I mean I get success message from the server I am contacting to. (When I say “externally” I mean I have a Firefox add-on which takes a URL and XML, posts it and shows the response XML. ) No fancy stuff is required (i.e. any kind of automation, site designing etc.). Okay, I need this really fast (less than 24 hours). It’s a small code and I think should take less than 30 minutes for a pro .net developer. My budget is very low (USD 10). Bids above this will not be entertained. Cheers.