Bluetooth headset and Broadcom drivers - Patric

I recently installed Vista Ultimate x64 and connected my Zonet Bluetooth USB
dongle.  Windows detected the dongle as a BCM2035 Bluetooth radio. I could
pair my Blueant X3 headset but Windows would then ask me to install the
driver disk, which of course I didn't have.

Later I found out that you need the drivers installed to get the correct
Bluetooth profiles installed. I found the Broadcom Bluetooth drivers from the
company website and installed them. My headset is now correctly detected as a
headset and I can see it in the Bluetooth control panel in the Audio tab. If
I click the headset and click the Connect button I get a popup that says this:

BtwApplExt
The parameter is incorrect

Has anyone ever seen this problem before? Is there anything else I can try
to get this headset to work?