Issues syncing calendar w/Outlook thru DM

I've searched here and not found anything quite like this. What happens is I'll sync my calendar one time and everything's ok. Then the next time it syncs, every event or appointment is a day earlier, say 7/18/2009 instead of 7/19/2009, like everything shifted a day. Has anybody else had this problem? I'm using Outlook 2007, and DM 5.0
I've checked my events and appointments in Outlook to make sure they are for the correct day; I learned that even though the placeholder on the Outlook calendar may be on the correct day, the actual setting in Recurrences may not be; this is not the case as I've checked them. I've tried clearing the calendar databases and starting over, but it didn't help. Any ideas?