N95 Bluetooth Modem can't connect to Internet

Hi guys

i have a strange problem with my N95 (Firmware: new 12....) and
Windows XP (SP2). It works just fine as Modem (GPRS/UMTS) using the
USB-Cable. Now i'm trying to use it as Modem via Bluetooth. I've
connected it via Nokia PC Suite, everything looks good - Datatransfer,
Sync and so on, no problem. There was also automatically a new Modem
installed called "BluetoothConnection".

This new Modem cannot be seen in Nokia One Touch. But i never use One
Touch anyway, instead simply a desktop link of the modem (wich is
actually easier, IMO).

Now when i try to connect using the bluetooth connection i see on the
phone that it correctly connects to the computer (brackets arround the
bt symbol) and then tries to make a internet-connection (dashed lines
on the left upper side of the phone). But the dashed lines on the
phone disappear after 2-3 seconds and the computer shows failure at
"Registering computer in network".

the bluetoothconnection-connection is configured exactly like the USB
connection. even if i change the USB connection to use the bluetooth
connection i have the same result, no connection.

i've also installed the latest inf-file from the Nokia page for
Bluetooth Modem. restarted both devices of course

Can anyone guide me into a direction here? thanks!

Ty