Use the following steps to repair your contacts:
- click Tools then Email Accounts
- click on "View or change existing directories or address books" option.
- click "Next".
- click on "Add" button then "Additional Address Books" option.
- click "Next".
- click on the "Outlook Address Book" option.
- click "Next".
- click on "Finish" button.
- click on the "Contacts" tab
- right-click on the "Contacts" option on the left-hand side (under "My Contacts").
- click on the "Properties" option - see multi-tabbed dialog.
- click on the "Outlook Address Book" tab.
- ensure that the "Show this folder as an e-mail address book" option is selected.
- click OK.
Your Contacts database should now be active as an e-mail address book.