Log in issue

Hello ,
I start the game , write my email and password and it doesnt let me log in . It said : You have been disconnected from the server. What is the reason for that ??? Its from 2-3 days that way. Since then i have no trouble to log in and play . Anybody know how to fix it ???

Dont login with your email, you need to login with your username

No, its not that . I try with username , I tried with email ... nothing.