VM Multilanguage - products do not appear

[tiagovareta]

Hi, I'm working with:
Joomla 2.5.4 + VirtueMart 2.0.6

The site is multilingual and has put several items with their respective translations.
The situation is that the articles are in Portuguese but do not appear when I change language items are there (You can see what I'm talking about http://www.seiva.pt).
Does anyone can tell me how to resolve this situation?