mkv very slow with ION computer (Frodo) [SOLVED]

I Was using Eden version without ANY video problems since it`s release (SD and HD videos).

In Frodo version (RC3) when I start playing an MKV high definition video, it plays VERY slow and without sound.

With Eden version works fine (it happens with all my hd videos, not only one). Video decode is in "auto detect" and DVXA2 is enabled (in both versions). But in new version doesn´t work.

Tried to force DVXA video decode, but same performance. SD videos (AVI) works, but not mkv hd videos.

My Personal computer is an ION (atom 330) with win 7 x32 starter.

¿Need more info?

THANKS!