iDeal payment, how to configure?

Hello,

At the moment I try iDeal payment module set.
I do this by the payment module on ‘other’ position, following which I enter a url and a data pair.

IDeal following url been that I should use:
https://secure.mollie.nl/xml/ideal?a=create-link&partnerid = [partner id] & amount = [amount] & description = [description]

Now the problem is when I put it in “Get ‘use in data pair and the next move:
partnerid|[partner id],amount|[amount],description|[description]

I get to pay this url:
https://secure.mollie.nl/xml/ideal?&quantity_1=1&amount_1=25.9&description1=belts_2.png&promocode=&shipping=ims_ship_local&instructions=&checkout=Check out&partnerid=[partner id]&amount=28.9&_wpnonce=bfbe3708d8

This is not right? I must get this url:
https://secure.mollie.nl/xml/ideal?a=create-link&partnerid = [partner id] & amount = 09.28 & description = Photo 20

If I go to the last url (correctly completed), I get an XML file where url is a payment where a customer to be redirected, how can I do?

I get this:

https://secure.mollie.nl/pay/ideal/747157-405085ee/500_test/bb8c0e975f3f11d3e6c92347473b972c0eb4edec

Your iDEAL-link has been successfully setup. Your customer should visit the given URL to make the payment.

the URL in the XML file must be used.
Customers should automatically be redirected to that URL.

can anyone help me with this?

thanks

Kind regards,
Bryan Wardenaar