Mollie paygateway problem

I have installed the Mollie plugin for EM Pro but is doesn’t come up when I make a booking.
Mollie is activated but how can I get it coming up in booking porcedure.

After submit the form no paygateway (iDeal) comes up.
See https://bureaustralingmeten.nl/evenementen

So, I can not see a ‘Pay with’ button/dropdown.

The page I need help with: [log in to see the link]