Hello RiverZ,
Sorry to hear that you're having problems with the Magento login. Check out this post from the Magento forums: Change Admin path. I can't select any particular solution for you since your account doesn't link to a hosting account where I can try to look at the issue. And we don't have an idea of version of Magento you're using. Please go through the posts in regards to the issue and you should see a listed solution for the problem.
Regards,
Arnel C.