Ameya, the admit cards have been available for download  only yesterday. And there has been a huge traffic to the website ever since. So there are technical glitches that  students have been facing due to the huge traffic to the website. So give it a while before you try to login again. Try downloading the admit card either during late night hours or early morning hours when the traffic is relatively lesser. If it still persists, please mail the helpdesk at: neetpg@nbe.edu.in