Urgent problem, users cannot login for checkout!

[gopas]

Hey guys, im pretty new to Virtuemart and im having a rather strange problem that seems to be  happening only to me! The site is here: http://www.e-biofire.gr/index.php and is running Virtuemart 2.0.1 on Joomla 1.7
The problem is that once a product is added to the cart, the users cannot login in order to checkout. That is after the first login attempt, the cart is empty and then if one tries to login again then he gets Invalid Token error.
Does anyybody out there have any possible ideas on it?

You can try this account for logging in:
username: ggeo
password: 123456

Thanks in advance!

[bytelord]

Hello,

I think you should upgrade your site to joomla 2.5.8 and vm 2.0.14. Then you have to adjust your templates with those updates. VM 2.0.1 is too old and buggy. Also joomla 1.7 is not as stable as 2.5
btw, the error you describe i think related with joomla, not vm. VM uses the joomla user component.

Regards