yesterday i moved my xbox to the basement and hooked it up to xbox live through the wirless device. it worked. today i moved it back upstairs and hooked it up through a cable and i couldnt connect to xbox live. i first got an error that my IP address failed. so then i manually changed it so it would work. then i got a DNS failure. i did the same thing and manually changed it. Now it says my MTU failed. i looked online and it said i have to set my routers MTU to 1364-1492. i did that and it still doesnt work. i did not get a different router and nothing new was set up to the network. how do i fix this.