Exchng 2K public folder item pointers

I've just done a clean install of Exchange 2000 on Win2K and manually moved my public folder items from my old Exchange 5.5 box to my new server.

When I try to open some of the items in Outlook 2002, I get a message that Outlook is trying to open the item on the *old* 5.5 server. It doesn't happen on all of the items -- some of my contacts in the public folder open just fine and some don't. It seems to be limited to folders with contact items in them.