Using Multiple AppleTV and Home Sharing

I have two 2nd Generation AppleTVs and two 1st Generation AppleTVs on my home network. All AppleTVs are using the same Home Sharing Apple ID and Apple ID is turned on in iTunes on my iMAC. For some reason one of my 1st Generation AppleTVs can only see Music from my Home Sharing. If I click on COMPUTERS from one of 1st Generation AppleTVs it says that I need to turn on Home Sharing using the same Apple ID. Funnything is I can see my Music Library but not movies that I have added to my iTunes Library on my iMAC. I'm able to see these on all my other AppleTVs. I definitely have network connectivity because I can get to Netflix and stream movies. Any ideas?