remote app doesn't work correctly

Hello,

at first sorry for my bad English!

I'm using two iPads (2 + 3) und two AppleTV (2. and 3. generation) to listen music or looking movies in my house. To control all activities I'm using the Apple remote app.

Now my problem: on my iPad 3 the "remote app" doesn't work correctly. I can see both AppleTV and the server iTunes is running, but if I choose the iTunes libaray on my server, I see all tracks and movies, but after I start playing i will get the message "... can't find the original music file..." and (not so important), the gyroscope doesn't work in REMOTE on my iPad 3. With my iPad 2 I haven't such problems.

This effects I have since month, so the change to iOS7 is not the reason.

Can someone help me?

Kind Regards

Markus