[seems solved] Checkout bug (we assume caused by outdated nl language file)

[Awerso]

I'm using J1.7.1 and VM 2.0.0-RC-2H.
Virtuemart is only visible after registration, when i have added some products en proceed to the checkout a error shows up.
When I press the checkout button i get the 404 page and I'm also logged out of the public area.. If I try to login after that I get the 404 page again, after that going to the login page give me the change to logout and then to login again.
Anyone an idea? I didn't have this bug with version G and there are only some text changes since the update tot VM version H.

Edit:
I have removed the Dutch language files and downloaded the new ones and I don't get this bug anymore, hopefully it's solved!