Hello and welcome to BBF.
I did a quick google for 'Nokia CK 7W and blackberry' and it seems that the 2 are not compatible, some have gotten it to work but the sound is echoey.
http://www.blackberryforums.com/blue...w-problem.html
Found this also. "The Nokia CK-7W car kit uses Bluetooth ver 1.2. Blackberry Pearls and most modern (non nokia) mobiles use Bluetooth 2.0. Nokia do have a bluetooth 2.0 supported car kit but it doesn't have a pop port for charging. Seems nokia want to force owners to stay true to Nokia by making sure nothing else works unless you rip out the car kit. Way to go nokia"