Problem with Audi bluetooth carkit and MDAIII

Hi,

I have a MDAIII pocket PC with Windows Mobile 2003SE. In my car I have a
n original bluetooth carkit. It is possible to make a connection with
the carkit. The problem I have is that several functions from my carkit
I cannot use. For instance: read the contacts into the memory of the
car, pickup the phone on the steering wheel, etc. The only thing that
works is to make a call with the pocket pc, then the carkit works fine.
I've tried to change some registry settings, but this windows mobile
edition has only a couple of settings.
Any suggestions?

Please help,
Ronnie-b.