Checkout Continue to page 2 doesn´t work

-- url of the page with the problem -- : mywebsite.com/mypage
-- HikaShop version -- :2.2.1
-- Joomla version -- : 3.1.5
-- PHP version -- : x.x.x
-- Browser(s) name and version -- : XXXXX x.x.x
-- Error-message(debug-mod must be tuned on) -- : Error_message

Hi Nicolas!

We have a problem with the Checkout. shop.cgdu.de
Steps to reproduce:
1st Put a book into the cart and go to the checkout
(I think the problem only appears with physical goods because there is no shipping option if there are only digital goods in the cart)
2nd Select the shipping option
3rd select the payment option
4rd continue "weiter"

You stay at Step 1!
If you select the shipping option again, it works and goes directly to step 2 (well.. it shouldn´t because you should click the button to go on).
It is also possible to click on step 2 directly in the checkout process bar but some customers don´t know that.

How can we solve that?
Thanks a lot!
Simon

It was set to
if only if one method is available.
I set it and the next option (Automatically transmit delivery and payment method) to "no" to see if it changes something but it doesn´t.
I still stick to page one.