" Admit Cards for AIIMS PG July 2012 (MDS and MD/MS/MCH(6yr)) Courses are available on www.aiimsexams.org. Candidates are advised to login in online system by providing Application NO. and Password that has been provided at the time of online registration and get there admit card by clicking on link provided for Admit Card." and provide the links
http://mdmsmch.aiimsexams.org/StudentLogin.aspx - for MD/MS/MCH(6yr) 
http://mds.aiimsonline.in/StudentLogin.aspx - for MDS