First, choose time for the game and your pieces(clicking on the king). Then click in *begin*, is that clear?... then you move your pieces with click-click...
In the status bar of your navigator should appear some data about the search in progress.
Have a nice game!
You can download this applet, and you can put it at your site if you wish: here.
Don't forget that you can also play with this another game which is fun.