ost syncronisation calender errors

[scorelord]

I have the following error. Some dutch but hey. It should be clear.

11:23:26 Serverwijzigingen in de map Calendar synchroniseren
11:23:26 Downloaden van de server mailserver.nl
11:23:28 Fout bij het synchroniseren van de map
11:23:28 [80004005-501-FFFFF9BF-560]
11:23:28 The client operation failed.
11:23:28 Informatiearchief van Microsoft Exchange
Server
11:23:28 Klik op onderstaande URL voor meer informatie
over deze
fout:
11:23:28
http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-fffff9bf-560

11:23:28 Serverwijzigingen in de map Contacts synchroniseren
11:23:28 Downloaden van de server mailserver.nl11:23:28
Serverwijzigingen in de map Concepten synchroniseren


So i get a "client operation failed" error on synchronisation with 1 or
more calender-items. The OST-file is NOT corrupt. I use outlook 2003 on
an exchange server 5.5. I already tried it on a new computer so i also
have a clean OST file
but the error keeps coming back. How can i recognise the corrupt
calenderitem(s) that won't be imported in the ost file? It's not a
recurring conficting item tho.

pls help.