Please could you be more explicit?, I'll expose an example to be totally clear.

Imagine that in the Xbox we have 2 signed-in players, one is Gold and the other one not, then, where is the failure?

1. The method Create() or Join() session fails (Privilege exception or any other failure).
2. Methods Gamer.SendData() and Gamer.ReceiveData() fails (in the typical foreach(LocalNetworkGamer gamer){gamer.ReceiveData()...})).

A response to this (selecting 1 or 2) can gives me what I am searchng for.

In the other hand, how can you make a guest sign-in in XNA?, is with the standard Guide.ShowSignIn() method? (of course once with a signed-in Gold user). In Gears of Wars we see that it has its own with the Y-button in this url: How to add an xbox live guest for Gears of War?

Thanks.

The Guide signin UI includes the option to sign in as a guest if you specify that you only want online profiles.

jwatte:

It has been my experiece that if a non-Gold profile signs in while the XNA Game Studio Connect application is running your game, the game will immediately be terminated.

Really? It works for me...

You need to make sure only the account that has your Creators Club subscription is signed in when you first launch GS Connect. Then sign in additional profiles after that point.

Then sign in additional profiles after that point.

When I do, in 2.0, I immediately get an error saying "one of the profiles signed in does not have a creator's club account" and my game exits.