WDTV 1 problem with DTS sound on mkv files Options

[actarus2878]

i'm posting this message because i'm experiencing a weird problem sonce a few weeks with my wdtv 1 with 1.03 firmwar, when i try to play mkv files with more than 1 DTS sound tracks on it, my WDTV begins playing the file but after appriximatively 1 minute the image freezes, until the image freezes the sound works fine as my wdtv is connected to my home cinema via optical. after the image has frozen i'm able to return to main menu but as soon as i try to launch a video the same frozen image appears on screen, it appears as soon as i try to launch any video not just if i try to relaunch the video that froze earlier and as soon as i get to the main menu on the top center of my screen a little window with the icon of a music note appear with the name of the video that just froze in it, it is as if the wdtv after the freeze is trying to launch the video as if would be a music file. the only way to watch a video is then to completely unplug the WDTV's from power wait a few seconds and plug it again, the wdtv then reboots and i'm able to watch other videos the ^box on the top center of the screen then dissapears and if i launch another video i don't get the frozen image on screen anymore. It is really annmoying as i'm now totally unable to watch mkv files encoded with a DTS track altrough i have a home cinema to decode dts properlly.

any help would be much appreciated