WD TV Live doesnt play .mkv video properly

Are you in a PAL country?  The frame rates on those files is odd (25 – here in NTSC land we’d expect 29.97 or 24 depending on whether it’s a television show or a movie).

My gut tells me the frame rate is the problem but I don’t know nuttin about PAL countries.  And how did you create them?  (Walking us through all the steps would be helpful).