iTunes gone? Messed up Home Sharing?

I can not connect to iTunes from my ATV2, but I can send video from iTunes to the ATV (?!) Tried resetting and all the good stuff no luck.

Any suggestions? I have updated everything, rechecked, homesharing is on and yada yada yada, and reinstalled all onto the ATV with no luck. I would like to use my library again, please help.


Many thanks