HTD5500 mkv audio issue

[chaosmaker]

Dear All,

I was wondering whether other people have had a similar issue with their HT-D5500 (or similar).
So what happens is this:

I have an mkv file with AC3 or DTS audio and it plays fine for about 1-2 min. Then suddenly audio stops working. When I seek through the file you can hear a small blib of sound but it immediately goes mute again. Weirdly enough, my B series TV with the dca module plays the file fine and it doesn't always happen.
Does anyone have an idea what might be happening there?
Alternatively does anyone know whether the B series dca module can be recompiled to work on the D series HT system?

Thanks
Chaos