I have two Xbox360s and am having real problems connecting to Live. I have 1 xbox wired and 1 xbox wireless. The problem only seems to exist when both xbox360s are on and connected at the same time.

Only one will connect to the service (usually the first console to be booted) and the other will connect to the router fine but will fail to some degree when it attempts to connect to Live.

I'm not very techie and have done my best, changed several settings, opened the relevent ports and initiated UPnP. But I'm still getting NAT moderate warnings and failures, along with ICMP response errors on one of the consoles if the other is connected.

Please can someone help me? My lad and his mates are dying to kick my arse on a number of games (on which I've been gatting major practice, on the sly) and now I'm getting desperate.

Cheers in advance!