itunes says my home sharing is "on" however on my tv, when I click on computers it keeps telling me I need to turn home sharing on? can anyone help me

You have to switch off and on the homesharing on Itunes and than it works again.

I have done several tests with the 3d generation apple tv, and when the connection between ITunes and Apple TV works correct and after that you use an other connection with the Apple TV for example with your Iphone or Ipad, this error occurs.

I hope there is a solution for this otherwise I need to switch the button on Itunes again and again.

This isn't the right way to use Itunes and Apple TV I presume.

Did you enter the home sharing user ID and passowrd you created into AppleTV?

Apple Support desk solved this problem (many thanks).

The sleeptimer of the computer must be switched-off otherwise teh connection between the Apple TV and the computer will be lost after sometime.

I am having the same problem, but changing the computer going to sleep option to "never" didn't help. I have turned Home Sharing off and on on the computer several times. I have tried resetting and restarting Apple TV. I have tried unplugging the Apple TV. I have tried changing the IP address to 8.8.8.8. I have tried resetting my router. NOTHING BLOODY WORKS. My husband is exasperated with me, as he wanted to watch a "Monk" marathon on Apple TV, but the ****.THING.DOESN'T.WORK. I don't know what else to do.

I did what you did, and it doesn't work for me either. Home Sharing is on, on my computer, all the logins are correct (matching) for both Apple TV and my MacBook Air. Apple TV shows the same message, "Please turn on Home Sharing on your computer" or something like that. And it IS on.

I had this problem too. My PC is connected to my router via an ethernet cable and my Apple TV is connected via wireless. When I phoned Apple they said that my router was probably sending the signals via two different sub networks, one for ethernet and one for wireless and so the Apple TV couldn't see my computer (It's like they are on different connections). I didn't really understand how my router was setting up sub networks but when I connected my Apple TV via ethernet it works fine and then stops again when I use wireless. I restarted my router and it was ok so I then went into my router settings and selected to always use the same channel for the Apple TV. So far it has worked everytime I've switched on.

I am still having this problem after restarting the apple tv itself restarting my router my computer everything. I have also checked several times my apple id and password are correct, of which they are similarly i have tried and tried again turning the home sharing in itunes on and off and my mac nor iphone will connect. I've had it for almost 2 months now and haven't been able to use it to the full extent because of this problem someone please help !