DVD playback again

Hi everyone,

I just bought aTV Flash yesterday, everything works like in the manuals... there us just the problem that DVD's don't play smooth, the movie is jerking from time to time, it is really bad over WiFi, Ethernet is better, and external USB is best, but even when connected through USB the VIDEO_TS folders don't play smooth... All the original iTunes Contents stream fine, even HD with 5.1 DD works like a charm... Why won't DVD? Actually I bought aTV flash for playing my DVD's over WiFi (802.11n 2.4GHz) ... looks like thats not going to happen... wasted money... or is there somebody who can help?

My ATV runs on 3.0.2 and I ran the Smart Installer Updates etc...