Buttons dont work

HI,
I have used your plug in on one of my websites with great success and decided to install the pro version on http://www.brca-lsor.org and despite have products set up and “buy now” buttons appearing on my page they don’t “hyperlink” to paypal.

The page is http://www.brca-lsor.org/payment which has a password of computer to see at this stage.

The buttons were originally inserted in another plugin (tablepress) as per my other site but since this did not work I direct coded them into a table and got the same result – nothing worked!.

Interestingly if I preview the table plugin on its own then the buttons work in this preview mode.

I am confused as I can not see what I’ve done wrong or got set wrong.

Darren

https://wordpress.org/plugins/paypal-responder/