Reloading xml

I have an ASP file on a server that when I send information to it, it changes the xml it sends back to me. eg:

www.gamesite.com/aspfile.asp&xpos=100&ypos=500&dir=2

Is there any reason it isnt loading this? It works fine in flash cs4 but when i put it onto a website it screws up. It is on the same domain as the aspf file so no worry of cross domain error.

Any ideas, thanks,

Stupid