Čau! I need help, BBC HD on 27.5°W, why no sound?

Čau! I need help, BBC HD on 27.5°W, why HD channels do not have sound?
Video works very good, SD channels video + sound, but HD chennels only Video.
i use openbox s6, signal i have very good (with offset 94 cm dish 5/6 level i get on 11495 V 44100-9/10 (level testet with openbox x-800)
i will know your experience with HD channels on 27.5°W , do you have sound, iff yes, how? and what receiver y use .

at moment i have -
BBC HD - video pid _6101 (work)
- sound pid _6102 (no)
- pcrPid _6101
audio stream type - mpg1/mpg2/dolby (no)
audio track - AUD 17B6/ 17DA (do not work)
maybe my reciever fault?
i use Mgcamd 1.37 EMU

y think if change audio pid, will help?
if they stream only video, then no change get audio

http://www.satbeams.com/footprints?beam=5703
sorry,you can not get bbc in Malta