ActiveSync crashes

Hi all,

I have the following configuration:
Home PC -
Windows XP, Outlook 2007 and ActiveSync 4.2
PDA -
QTEK Windows Mobile 5.

My PDA is synchronized with two PCs - at work and at home.

First I synchronized my PDA with the work computer - contacts and calendar.
The synchronization was ok. The contacts and calendar items are on the work
PC and on PDA.

Then I synchronized my PDA with the home computer - contacts only. The
synchronization was ok and all contacts ware copied to the home PC.

The home PC has no calendar items. When I have added calendar to the
synchronization with the home PC, the Active Sync crashed. After this on
the home PC I'm getting a lot of empty meetings.

The crash has the following infomation:
AppName: wcesmgr.exe AppVer: 4.2.4876.0 ModName: msvcr71.dll
ModVer: 7.10.3052.4 Offset: 00010440

How can I solve the problem and how can I know which calendar item is
problematic?

Thanks a lot,
Julia