i have my modem connected to my router, i then ran an ethernet cable to a switch which is connected to my xbox with another ethernet cable. i was playing halo 2 on xbox live for awhile and then it disconnected me. when i test my connection it says that i am having IP address problems. however it didn't change from when it worked to when it didn't so it doesn't make much sense. i can't log into xbox live and it isn't recognizing my user name to log in when i try to in halo either. any suggestions would be appreciated, thanks.