iPad2 doesn't recognize iTunes server

[bludin]

Hi folks

I have a beginners question: I have a NAS (a Thecus N5200XXX) with a iTunes server running on it. iTunes on my PC sees the NAS under "Shared" and can play the media residing on the NAS. How do I achieve the same with my iPad2? The iPod app sees the iTunes mediathek on my PC and plays the files, but it doesn't see the NAS.

TIA,
Beat