How do I get payments to work on the site

I would like some help on this guys because I'm pulling my hair out trying to fix the problem.

I am not able to get the payment option to work.

When you click on sign up on the home page all it does it go back to the home page
I followed the instructions to install this plugin however it doesn't seem to want to play the game.

I am also missing submit a site under the directory theme settings.