I want to share a workaround that works for me. I have old HP Compaq nx6310 with some kind of intel bluetooth with Windows 7 (32bit).
I have exactly the same symptoms: after adding BH 200 in bluetooth decvices it is working fine until I turn it off. After that It disappears from "playback devices" list.\
One option (very inconvenient) it to remove it and add it again.
But I have also found that if I turn the headset on, turn the bluetooth radio on my computer off and then on again, the headset is back on the list and working fine.
I hope it will work for someone else, I haven't found anything better on the net.