Sending stream from service to WP7

Question

I am creating an app on wp7 which receives a file from service via service bus.

I am able receive a zip file of 20MB on WP7 from web service but when after integrating service bus, i am unable to receive even a 20KB file on WP7.

I tried using WebClient and WebRequest on WP7.

After a couple of minutes, i get either a corrupted stream or an error saying "Remote server returned an error: Not Found"

Can anyone please solve this?