Hi,
To solve the problem that happens in here:
www.lebioc.es
Re-install the "Dropdown Shopping Cart" Module and Plugin. If you touch "any single" line in the PHP files (that comes with the drop down shopping cart), the AJAX won't work as expected. And i am seeing you have touched the PHP file and changed the way the module appears.
Re-installing the "Module" and the "Plugin" will retrieve the files back to stock and everything will work as expected.
The problem happens here:
regalosdecocina.com
is a lot more serious. Because the Virtuemart Core "add to cart" event doesn't get triggered. I have never seen something like this before.
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BY THE WAY, DID YOU MANUALLY DELETE THAT TEXT FROM THE MODAL POPUP?
Forget about our drop down shopping cart module, even the "Add to Cart" notification window doesn't say anything regarding to product being added. So this makes me thing, the problem is more serious. It might related to "Cache". What happens if you disable the "Cache" (both Joomla Cache and xCache). Does the issue remain the same?
-- UPDATE: after making several more tests. I am seeing that you manually deleted the text from the modal popup, which is fine. And the "Dropdown Shopping Cart" module works just fine. I added several products to cart, and i didn't notice any problem of "adding product to cart" issue at all. The number (inside the red circle) gets updated successfully.
Regards,
Support