Another user posted a link from ehow.com regarding this. Seems that you have to call the 3 credit beaureus and tell them that your social changed and to transfer all info to the new social. If you had or used another social before then this is what you have to do. Maybe someone can help with the link.
__________________
App Received: 8/27/12-----------Biometrics date:10/02/2012
Walk-in: 9/27/2012--------------EAD approved: 10/16
EAD Received: 10/20/12---------SSN Received: 10/29/12
ID/DL Received: 11/1712---------Job started: