Every time I try to connect to certain friends on xbox live I get the error message, cannot connect to server... This started about as soon as I started inviting friends but was never as bad as it is now. I can play in regular live games no problem but when I invite or get invited by certain friends i get this message and get disconnected. I tried bypassing the wireless router with an ethernet cable, same result, tried replacing the modem, same result. Got the isp to check it out here and they said no problems on their end. Tried my console in another location and it worked fine using a different gamer tag. Reset my gamertag and still got the same issue. Pulled up the gamertag on somebody elses console and still the same issue. Looks like certain gamertags are not compatible with one another... If u have some input I would really appreciate it, by the look of it Im not the only person with this issue.