Does anybody knows what the problem is if you can't sync your apointments from your P910i to Outlook with BB?

It works the other way around from Outlook to P910i with BB and there are no problem with the phone.

Can anybody help me?

In my case I had a similar thing with my BB 7230 (wouldn't synch both ways), after I installed P910 nothing would work. But after they removed and re-added me from\to BES server, I started with new profile everything started working both ways.