Now I know the problem, the Linkstation mediaserver can not sort in numeric order!! This is as it sorts the songs
1
10
11
12
...
2
21
22
..
3
31
...
how is it possible? Is there any solution?
The problem is in the Nas media server because the problem does not occour using windows as media server or media tomb (a pretty UPnP media server for GNU/Linux). The songs are sorted in the right way.