To select the audio output device on a computer running Windows XP operating system, follow these steps:
Selecting the audio output device on a PC running Windows® XP
Click the "Start" button on the lower-left corner of the screen
Click the Windows "Control Panel"
Click the "Sounds and Audio Devices" icon
NOTE: You may need to switch to "Classic View" in the top left corner to see the System Menu above.
the sounds and audio devices properties window appears. in the "audio" tab, under the "sound playback" selection, select the bluetooth® device from the pulldown menu
If you made any changes, click "Apply," and then click "OK" to close the window