Address book won't locate contacts, even though they appear in Out

After having to reformat my hard drive and reinstall Windows, I restored my
previous Outlook files from a backup, placing them in the folder where
Outlook would normally keep them. In order to properly coordinate with my
Dell Axim using Activesync, I deleted the calender so I could import the
currently correct one. I noticed that all my contacts show up properly in
Outlook contact view, but when I go to address book, it is blank, and I get a
message saying that the contacts folder associated with this address book
could not be opened. How can I get the address book to recognize the
contacts currently in Outlook?
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Larry S