Dear Prem, please try this link. http://aibe13.allindiabarexamination.com/admitcard.aspx

With so many candidates trying to download their admit cards, there must be server issues. I would suggest you to try downloadingbthe admit card in either in the early hours of morning or late hours at night when the traffic is less. 

If problem persists, please call their helpline no# from Monday to Saturday 10am to 5pm at the no#s avaliable at their home page, http://www.allindiabarexamination.com/