Im 360 is found on the settings and my network is reachable.....What could be the problem....Games were showing up and the next day i went to play and they were gone????

My comp is connected to the router (wired) and im using a crossover cable to my 360 what could be the problem???

what game are you trying to play ? .. 360 games have a ping limit on kai .. are you running any firewalls ? .. do you have ICS enabled to the 360 ?

Try right-click and exit kai engine on your quick launch, make sure your console is on before you run kai, and check whether the console is detected each time. Sounds too easy I know, but for some reason it has been catching there with me also lately.