now I can sync my Vodafone VDA. Push is disabled and I set the option to terminate connection after a sync - But the connection will not be terminated after a sync. I tried all other options (maybe because of a wrong translation) The phone is still connected.

The Vodafone VPA V works with smartphone windows mobile 6.
I tried 2 other pocket pc windows mobile 6 clients and there I don't have this problem.

Now I'm looking if this problem is a "standard" smartphone feature or it is device related.