connecting Audikast D4169 dual wireless head phones to Bose sound bar

Just bought the Avantree D4169 Dual wireless headphones and I am trying to get them to connect to the Bose sound bar using the Aux from the Bose speaker to the AUX the the transmitter AUX plug in's .  Can not get any sound this way.  Hocking it up  to the cable box audio to the AUX on the transmitter gives me sound but does not follow when I change to a movie on Nexflex.  What can I do to make it work thru the Bose sound bar?   Need HELP!!!