Can't find link keys

Hi
I m using USB Bluetooth adapter to discover devices & connect to it.
I can easily discover it using my test program
But when I m going to connect it to rfcomm, it prompts me to enter PIN
to accept connection.
As I m entering PIN the connection fails as it don't find link key in
/var/lib/bluetooth/

So I m not able to pair my bluetooth enable Mobile / Headset with
application running in PC.
What is its remedie?

Pls mail if somebody knows it solution.

-- 
Kartikey Parmar
President AAECC
09879095390 (M)