T46g / T48g with Bluetooth Sennheiser MB Pro1

[itchybee]

Hi everybody,

it would be nice to know if it's possible to connect an Sennheiser MB Pro1 bluetooth headset with a T46g or an T48g.
I already have a T46g, including the BT40 dongle and the proposed Sennheiser headset. So far the T46g finds the headset, but if I try to pair the headset with the phone, there is only the message "Connect failed". For only one time, of my about 40 tries, I got a input field for the pairing code and after that the pairing failed again.
I tried it with different firmware versions, including the 28.73.0.50, but with no positive changes.
So the question is, is there any possibility to connect the headset with the Phone or can the problem be solved by a future firmware version?

Best regards
itchybee