problem with dell bh200 with bluetooth 2.0 EDR with windows xp sp2

when i try connecting headset with my desktop as per user guide, it says i
need to give passkey during pairing process as 0000(four zero). when i enter
"0000" and click next it shows that there is an error receiving passkey from
the bluetooth device.
i use the same pass key to connect the same headset with my another laptop
having vista in it and its works there.
i dont know why passkey is not working here in windows xp?
if you want more clarification please ask me.

Denish