Q: Apple TV problem

I've had my Apple tv for almost a year all of a sudden it won't connect to the network, or it says can't connect to iTunes, but my other apple TVs don't have this problem. Rebooted computer and Apple TV and still want connect.  Now it says my apple id/password are wrong... They are correct and I am logged into iTunes in my Mac. The weird thing is i was able to get Apple tv to work last night but as soon as it shut off and i turned it in this morning nothing... Any suggestions?