My e-mail works fine, but I can't access my Contacts or my Calendar!!! I thought that the three applications were all part of the Outlook.pst. I'm running Windows Vista Home Premium (32-bit). When I click on Contacts in the Navigation Pane, I get the following message "The messaging interface has returned an unknown error; if the problem persists, restart Outlook". When I try to view my calendar, the message on the screen says "Cannot display the folder". I tried the Inbox repair tool, but it became "hung up" during the process, and I could not proceed. Can anybody help me with this?