Not going to the next step after pressing "Proceed to checkout"

Hi,
I can't find the solution for this.
When I add a product to the cart., i go to the cart (left side of the page).
When I click at Proceed to checkout (Verder naar kassa) the page will refresh but no further step.

I hope someone can help me to fix it.

I already followed these topics, but not with a possitive reseult:
www.hikashop.com/forum/checkout/892478-i...ity-in-the-cart.html

www.hikashop.com/forum/checkout/897373-c...p-update.html#306082

Hi Nicolas,
Yes it is the same website.
This is what i do:
1. I select a product in the shop.
2. I add the product to the cart.
3. I see the product in the cart module on the left and click in that module at Proceed to checkout.
The selected product(s) in the cart is visible at a new page, where I can check it.
4. I click at the right bottom at the Next button (Volgende).

At that moment, normally I should go to the next step (2) of the order process.
But the first step remains blue.
And I can click at the Next button many times, but every time I see the selected product(s) page is refreshing but nothing more than that.

Can you try it again and see if you can reproduce this?

I am trying to fix the issue.
For now I checked the wortkflow and everything looks good.
Except the error at the.
When I finish the checkout I should go to IDEAL via Sisow.
But I receive this error:

An error occurred while starting the payment, please try again or choose a different payment method. (, TA3227)

Yes that's correct. I contacted the payment provider.
I hope they will respond today.

Strange thing in my Hikashop is that when I configure the workflow in rows, I can not go to the next step.
But when I configure all the steps in one row, then I can continue to the next step.
Then all the steps are at one page.
Not a big problem, but before it worked good with thge woirkflow in rows.

How can I fix that?