Bluestar switching back and for with the radio

[bluestar1]

I purchase the Bluestar II two weeks ago and installed on Buick Lacrosse 2009. Installation very easy, paring no problem but when i try to make the call or press the mute button on the rear view mirror the radio display says Radio EQ1 and alternates with the radio station a few times and then radio keeps playing.
What i need to do ? , i also connected to the computer and there is no problem
thank you,