Why can't I track forward or backward from car stereo over Bluetooth?

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AC Question

Can't track fwd or backward from car stereo over Bluetooth

Just upgraded to the Z3 from old Galaxy 3 last week. Mostly love it except when I connect to my 2010 Mazda3 stock stereo over Bluetooth, the only control I have is volume, I can't skip tracks. My old 3 year old Galaxy 3 and older Galaxy 2 had no problem with this. Advice please?