I am trying to get the whmcs plugin to work, but it wont...

Hi,

I am trying to get the whmcs plugin to work, but it wont... the url where it should appear is:
http://www.famosoworldwide.com/customer-area/

i made an empty page, defined whmc sinstal folder, and selected to above ass standard content page. what else is needed?

also i sselected the portal theme...