Playing music from Windows Media Player to Bluetooth headphones

[James]

I am using Windows XP and want to play music from Windows Media Player 11 to
Bluetooth headphones (Motorola HT820). Although I can successfully pair the
headphones to the computer, I cannot get any music through the headphones
(only through the computer speakers). Do I need to install additional
software/hardware to get this to work?

Thanks for any help.

James