I had resolve this issue. The problem is the new addon domain had not been registered by Mei 2015. So I am using first domain which I registered before Mei 2015 and viola. So if anybody here still cannot acces cpanel then there is two possibilties I think. One is your accont was not registered before Mei 2015, other is your domain was not registered to your account before Mei 2015.
its just my assume, could be wrong.