If the only thing that happens is the word "done" appears below the login boxes, then you entered something incorrectly. Make sure Caps Lock is off and if you're using numbers, you're using the ones above the keyboard, not the numpad.
If you're trying to log in to the user panel, this does not allow you to play the game but should simply take you to a list of your characters. If you have no characters, there will be nothing here.
What should happen when you log in from the Play Game tab is it goes to a page that says "You must keep this page open while you play" at the top.