I need Help with Xbox.

[Mirage PMS]

I was playing last night with Cross and them and suddenly it kicked me offline and it wouldn't let me sign back on so I wanted until today and it still won't let me. So I tested my connection and it said that the "MTU" Connection failed? What is that? and why? If anyone can tell me please do so :(

[Freakstylez]

Google'd it: http://support.microsoft.com/kb/908882

Looks like you might have your connection split between too many things, or your router just went haywire.

[H2O Raiden]

How is your Xbox 360 connected to the internet? Before we can figure out the actual cause of this problem (one of the many listed in the link Lieunacy provided will probably be the issue) we need to know this. :)

[TechIsCool]

Have you tried reseting your Modem? its usually caused by slow network speed with Microsoft Servers

[xEnOnE]

micr0$0ft :killpc:

http://forum.teamxbox.com/archive/index.php/t-391238.html
sounds like a M$ server overload ;)
maybe contacting customer support will help a bit