SWF 5.4.4 audio channels

Hi,

I´m running SWF 5.4.4 (flash) on my Vizyon 8000 HD, and I´m very happy with it, except one thing:

I didn´t find out how to change the audio channel for TV channels broadcasted in more than one language (e.g. Sky Germany).
When I press the button for switching audio on the remote, I see a sign on the TV that this function is not available.

Thanks for any hints,
Tworan

Try the coloured buttons,, I think it's the yellow.

Cool, thanks - it was the yellow one.
I already have seen that menu, but only noticed the AC3 downmix, Stereo and Subservice options, not the audio channels.