Invitations Error
 

I have been trying to send out calendar invitations (which I have done
everyday for years) and all of a sudden the past week I am getting this
message...
"to be able to send invitations you need to create an address card for
yourself in address book" "iCal was unable to send the invitation"

Please help. I use this everyday. I created another address card for
myself but it still gave me the message. Thanks.