Hi, I'm trying to get your client/server sample up and running between my PC and xbox.  I made sure that the Guid in the AssemblyInfo.cs file was the same, deployed it and ran it on the xbox and pc, however neither one can find a game hosted by the other.  My xbox is just connected by ethernet to my computer which uses ICS on it's wireless, so they are on the same LAN as far as I know.

Any ideas?

I am having the same trouble as you are. Two of the computers on my network can find each other, but my computer and 360 just doesn't seem to want to do it. :(

Hey Elpram! I just fixed my problem, and I don't know if this will fix yours. Make sure you are using XNA 2.0 and not XNA 2.0 beta. If you are using the beta version, the Xbox won't find your session because the XNA on the Xbox is the final release. If you do have beta, go through the XNA 2.0 starting guide on this website to install the final release version.

I was pretty sure that I had the full release, but i reinstalled to be sure, and still no luck.

Do you have any Internet security on you computer? Any major firewalls?

None actually, not even the windows firewall.  I rely on my router and good surfing habits instead.