I can`t get the network samples (p2p, c/s) to find LAN sessions. I have two PC`s connected via a switch, and I can play other LAN games no problem.

I copied the sample to both PC`s;

started the projects;

created non-live profiles;

started a session on the first PC;

... but when I try to join that session on the seccond PC,  I keep getting "Error: No session found".

So, is there something more complicated I should do?

Tried turning off the firewall completely but still keep getting the same message. I've done no change to the code, just copied it and run it.

Well from what I see in the code, the network session can`t be updated unless you join.

In other words, on the client side, UpdateNetworkSession() isn`t called since networkSession == null.
The server side, on the other hand, does update.

Are you sure both the projects have the same GUID in the AssemblyInfo.cs ?

This might not be a problem for that sample (Because it's the same files), but for the .Net Rumble kit I had to update this.

Thanks CrowdedCrane, that was the problem, but I don`t know how to solve it. The Network Adapter used to be my ADSL connection, but I disconnected it so now it`s Local Area Network (that`s half the problem solved). Under Local IP address is my LAN address (that`s good also), but under System Link Address it says "Not Active". I followed the link provided in the Network Information sheet but I didn`t find anything useful there. Couldn`t even set the LAN as default Network Adapter.

So now the question is how to get it to recognize the System Link Address ??? 

Is anybody knowlidgable of this kind of problematics? As I said I changed nothing in the code, so I guess I should adjust some Windows settings for my LAN. Any help would be greatly appreciated as I`am nearing a deadline for my college project.

:)) Isn`t that just great Crane ....
Well at least you`ve got the System Link Address recognized when you`re offline - mine says 'Not Active'.
Anyway, I`ll keep trying to get to the bottom of this, If I find out anything I`ll be sure to post here.  

But all aside, I don`t think the end-user of the game should be bothered with stuff like manualy changing windows settings. I mean my LAN works just fine for non-XNA games. So I guess, I`ll give it a few days, after that I'll revert to System.NET - that train`s never late.

System Link sessions only work on the same subnet, which is why you wouldn't find sessions if one PC is on your DSL network and the other is still on the private 192.168 network.

I'll see what I can dig up about the "Not Active" state...I haven't seen that before.

Mitch Walker:

I'll see what I can dig up about the "Not Active" state...I haven't seen that before.

Well it's an honor to be the first :)))) Anyway, since I was stuck there, I decided to abandon XNA for networking, and went with this tutorial: http://www.ziggyware.com/readarticle.php?article_id=133 based on System.Net and Sockets. It's realy simple to follow, and effective, so I easily integrated it in my 3D game, although it's original implmentation is for a very simple 2d sample, so I recommend it 100%