I enter the correct username and password but after pressing okay, nothing happens and just status are (try to login/ offline)
Why?
What can i do?
P.S sorry my english

You probably have incorrect credentials when logging in or you have forgotten what your real credentials were. I believe there is a account recovery page for whenever you've lost a password, use that to your advantage if you've lost a password for the account. It's the best way to recover accounts. There will be a mail sent to you with the new credentials, good luck!

Maybe your a not connected to the internet

This.

maybe you pc is off

This.

---or:

Read similar threads on forum or follow advices on www.cs2d.com