Please note that login for this forum and for subtitles are NOT the same thing.
You should be able to login on
www.opensubtitles.org
If you don't already have an account for that, you can create one here:
http://www.opensubtitles.org/nl/newuser
You should use the login for the subtitles (NOT for this forum).
If that doesn't solve the issue, read this:
http://osdb.link/kodi
If that doesn't solve the issue, let us know and please be a bit more descriptive than "nothing happens".