bluetooth problem, any advice?

[samhu350z]

I see there are some guru's on here, so here we go......

 

I bought a bluetooth adaptor from someone on here, it connects and seems to work. But I bought my zed with an aftermarket single din sat nav player. But when I try to make a call it doesnt mute the music, or come through the speakers.

Is this a problem with my harness? Or need a different one?

 

If anybody has any advice on this, that would be great.

 

Cheers in advance

 

Sam