aspNETserve (or at least the simple UI) is broken under Windows XP in at least the following configuration:

aspNETserve versions 1.2, 1.2.1, and 1.3.0 Windows XP SP2 .NET 2.0 SP1

The application opens a TCP/IP port (as indicated by Windows Firewall), but is non responsive to requests. I have verified (as best I can) that the firewall is not blocking the communications.

This issue does not affect Windows Vista.

It appears that if a Windows XP machine has the .NET 3.5 SP1 framework (and by inclusion the .NET 2.0 SP2 framework) installed then everything works fine.

Closing this ticket as aspNETserve DOES work under XP, see the above system requirements.