had this problem. you have to do a full reset. Go to settings,about, scroll to the bottom and do a "reset your phone".. but wait!!!!!!!!!!! before you do thatl. Write down all your apps. If you use Google contacts, Windows Contacts or Facebook contacts, they will all load up. and.....if you paid for any apps they too will reload when you plug your phone to zune and u wont be charged for any... i have done this and has worked for me..
SSF ( samsung Focus w/nodo update)