cannot log in to admin

Can you access your cpanel?

I can log into cpanel with hostgator other then that I am not familiar with any other ways ?

One thing I forget to ask, do you forget your password or something? In that case you can follow these steps-
– Get an MD5 hash of your password. Visit md5 Hash Generator

– From cpanel, access phpMyAdmin and follow this link

If it is not your problem then give some more details.

not let me log in through domain/wp-admin

What is the real URL that does NOT work?