Server Error

[Bob]

I'm new to Asp.Net but have managed to create a simple page that uses
DownloadData to get information from a web page.

Unfortunately my PC needed a complete hard drive format and the
re-instalation of everything. When I now run my asp.net program I get
the following message:

The underlying connection was closed: An unexpected error occurred on
a receive

What does this mean? Is there something I need to change in my set up?

Thanks.