m4v files

I have on my box ATV2 xmbc the V-11 Eden “beta - version … a large number of films from the iTunes Store (m4v files) have the movies on the Buffalo NAS Navigator 2…

 The problem is when I then try to run the movies on xmbc (regardless of whether films of the series), the box will either crash or from the short film gestart and stops 

  

If I start xmbc stands, bottom right:

xmbc PBX add-error

and

no address associeted with hostname

can someone a hint how to solve the problem?

 

greeting

 

Are the films in 1080p or 720p? AppleTV tends to stutter on playback of 720p I have noticed and doesn’t have the hardware requirements to do 1080p.