Problem with the multiplayer !

I have a problem with multiplayer game in Forza 5 for one month. I can’t join the multiplayer lobby. But I can receive invitations from my friends and also can play the Rival.

When I use the other live account, the multiplayer game works. But not works with my account (ID: Joe Galldo)

What’s the problem with my Live account?

My friend have the same issue.
Live ID: ZHAOQU

Thanks