Got my new AppleTV yesterday, unboxed it and set it up without problems. Easily connected to my wireless network and was able to view movie and TV previews on iTunes. But when I tried to set up Home Sharing I ran into a problem. When I got to the "enter your Apple ID and password" screens, I repeatedly got an error message indicating "Unable To Sign In" because either my Apple ID or my password was not recognized. Eventually I spent over 90 minutes on the phone with Apple Support without success. Still cannot sign in. Support tech suggested I try connecting AppleTV to my wireless router using an ethernet cable to see if the problem resides in my router's security. I've got to run out and get an ethernet cable, but in the meantime, does anyone here have any suggestions or help they might offer me? Everything here runs wirelessly without problems (2 iPhones, iPad, MacBook Pro, and a Canon wireless printer). Thanks in advance!