I am trying to pair my 7520 with my IPAQ 5450 using bluetooth.

I enabled bluetooth on both my IPAQ and Blackberry

I follow the instructions on the screen of the IPAQ and I get the following error message:

Service device was unsuccessful

*Waiting for the device
*Authentication Successful
*Discovering device "Blackberry 7520"
*Waiting for the device.
*The requested service is not running on this device. Please
make sure the service is enabled on the device or select another one to continue.

Which device is in question and what service? What have I not turned on?
There is no other explanation that appears on the IPAQ.

Only headsets and (I have heard) some keyboards can be paired to the 7520. OS version 4.1 is supposed to improve this, but it's not out yet.