Synch Problem - Blackberry Curve 8330

I need to be able to synch the calendar on my Blackberry Curve 8330 with the calendar I have in Outlook Express.

The phone recognized my e-mail address and I can receive emails on the phone correctly.

When I want to synch the calendar, it does a few bars and then I get this error message:

Warning encountered. Warning code - 0x3b21
Check documentation.

That's it. The only option I have is to press "OK"

I have no idea what that means or what I can do about it but I need the calendar to be able to seek for my job.

Thanks.

BlackBerry Desktop Manager will not sync with the calender in Outlook Express. You will need to use Outlook or another supported application.

I didnt know there was a difference I guess.

I have Microsoft Outlook 2010 and I get that lame error.