Have you tried this with a std template e.g. Beez_20?
As we mention over and over again - before starting a post here check the base functionality of your site BEFORE our template is enabled...
this doesn't seem to be connected with our template - I see no javascript errors etc - so please disable our template and test
You can temporarily disable PureMart by changing the name of this folder from:
ROOT/templates/<yourjoomlatemplate>/html/com_virtuemart
to
ROOT/templates/<yourjoomlatemplate>/html/com_virtuemart2
and set any over-rides back to default
also as I say test also with Beez
Please report back what you find..