Passwords not working?

I'm having trouble logging into my smartftp. It keeps saying login incorrect, please specify password, but it's the same username and password i've always used. I know I need to get my login info from my Host, but i can't remember who that is or where I put my paperwork that would say who it is. Where would I be able to find out who my host is. Or does anyone know why all of a sudden my login information is no longer working? Any and all help and suggestions will be greatly appreciated.
This is what it says when i try to log in.
[11:13:36] SmartFTP v2.5.1006.46
[11:13:36] Resolving host name ""
[11:13:36] Connecting to Port: 21
[11:13:36] Connected to
[11:13:36] 220 (vsFTPd 2.0.5)
[11:13:36] USER ntsl765017%01F1910
[11:13:37] 331 Please specify the password.
[11:13:37] PASS (hidden)
[11:13:38] 530 Login incorrect.
[11:13:38] Active Help:
[11:13:38] Cannot login waiting to retry (30s)...