apple tv 1st gen you tube log in

How can I log in to you tube now in the 1st gen apple tv with updated software? it keeps on saying incorrect password from the time you tube and gmail was combined. Which one should I use, the orig you tube log in or the gmail log in? I tried both but still not accepted. I even tried normal re-set and factory re-set and re update software but still no luck. PLEASE HELP ME!