I made the migration of Joomla 2.5 to Joomla 3.0 and VirtueMart 2.6.18 to VirtueMart 3.0.9, and the store has the problem that does not work ordering. The server uses PHP 5.4.30. I have carefully reviewed the configuration of VirtueMart and I could not fix the problem. Thank you for your help.
Which Joomla 3 version?? Please be specific (latest is J3.4.1).
Nobody is going to be able to help without a URL.
Joomla 3.4.1, latest version.
The store URL es http://www.anisaweb.net/index.php/tienda.
There is a JavaScript issue. Not sure if this is it, but you are not loading chosen - see the image for what I use in config.
If that is not it or makes no difference then try with Beez or Protostar templates instead of the RT one and see if it works there.