Osx Mail Contacts Disappeared After Crash!!!


I was scheduling an iCal appt. and sending my notifications to 4 contacts from my Address book. After a minute or so of iCal, Mail and Address Book not responding in Force Quit screen, I force-quit one at a time to no avail. I then restarted and went back to sending out my iCal event but this time it said that I had to make sure that my info was enetered in Address Book? I opened my address book and I was theonly contact in there. There was over 500 contacts prior to this event???

Please help!