I have a version of umbraco on my own machine, and a vesion released to a dev server. i am just trying to test that it works, but whenever I try to connect via courier I get the error:

System.Net.Http.HttpRequestException: Error while copying content to a stream. ---> System.IO.IOException: Unable to read data from the transport connection. The connection was closed before all data could be read.

Does anyone have idea what could cause this?

Andrew