Range Rover L322 install

[BMGM3]

Hi everybody,

Please excuse the English only post, I think it better than using Google translate and mistranslating.

I've got my Xtrons PB7839BP installed and up and running with the I-Bus app and Resler and evrything seems good. 
When you are on a Ranger Rover with the DSP, the I-Bus is critical as it does not switch this on, you will not get any sound.
My question is, is there any way to set this up ? 
Thanks