[Hypnotic2010]

Heres a couple things to try:

1. Go to bluetooth then select your audio device, tap the + and usually there are two items listed - Stereo Audio and Hands-free;
2. Tap and hold either and choose Properties;
3. Uncheck the tick box that says "Connect separately to Bluetooth hands-free and stereo audio services.
4. Select Done and reboot your ppc.
5. Allow to reconnect and then play some music.

Or,




Im not exactly sure but this might be what you are looking for:

Features:
Instantly switch the audio between A2DP Device and the Windows Mobile Device
Supports both Pocket PCs and Smartphones
Bluetooth and Headsets state indicators
Advanced graphics
Settings panel with configurable options
Speakerphone support