Always do a search like this before posting here. Because many of the problems are already discussed. Post back if you have problems and the search won't help you. Thanks for your understanding.
What USB Bluetooth device are you using? (Make and device number)
My USB bluetooth device details.
Manufacturer - Cambridge Silicon Radio
HCI version - 2.0
HCI Revision - C5C
LMP version - 2.0
LMP revision - C5C
MAC Id - 00:18:E4:0B:B7:3B