On August 9, 2013, your Alien Registration Number was changed relating to your I129, PETITION FOR A NONIMMIGRANT WORKER. Please check our website at www.uscis.gov for further updates on your case. Please wait until the end of normal processing time before calling customer service at 1-800-375-5283 for live assistance.
Wait for sometime for the status to change to something else. If not, ask your attorney to follow-up w/ USCIS.