Customers cant get past registration/login page

Customrs can't get past registration/login page

I'm using advanced checkout workflow:
Step 1 = Login
Step 2 = Shipping, Address, Terms, Payment

Login = No
Registion = No registration
Display email confirmation field = Yes

Website:

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PHP 5.4.13, Hika 2.1.1

It wont progress past the first registation (Login module)
When submitting info on this form it is stored, however it just wont progress.
I've tried stacking all steps onto the same page, but it still wont progress.

Thanks for taking a look - I needed to act quick as the site is live - so copied complete set of HikaShop 2.1.1 files from a new installation, then added back in any customised template files etc. None of the customised files created an error/reoccurance of issue when being added back. Refresh of files seems to have done the job though. No idea what was causing the issue, but if it comes back, will be in touch.
Thanks for sorting out profile name too.

Hi,
I saw the same problem with hika 2.1.1 on a WAMP server.

I hope Nicolas can tell me that I can upgrade my live website without this problem!
Or is it beter that I wait till version 2.1.2?