Calendar - Connect to Outlook - Not syncing all items

Hi All,

I'm having a calendar in SP2010 and i can connect it with outlook 2010 without problems only he isn't syncing all the items. Only some of the existing items are synced and new items aren't synced at all. This is for both SP to outlook and outlook to SP.

The existing items that were synced are all recurring items.

What could be th problem here?

Thanks,

Laurens.