I just got my 9700 yesterday and I'm Oh so very excited hahaha! This is my first post in the forum too!
I guess this was asked a long time ago but anyway, here's your answer.
First, you need to turn your bluetooth on and your BB must be paired with your computer. Then you need to do the following:
1. Go to your Home screen, click the Media icon.
2. Click your Menu Button
3. Select "Receive using bluetooth"
4. If prompted, click "Yes".
5. If a password is needed, type 1234 or any number combination on your BB and then type the same number combination on your computer.
And that's it! : ) Hope it helps!