Spanish translation install

Hey there, great plugin!!!??Im having issues with Spanish translation, it turns that my site is already in Spanish, i uploaded po/mo files from repository and installed them on languages/plugins folder with no success, thus, i was wondering if filename is wrong, causing the issue. ??The question is, what is the right name of po/mo files? The site has a clean installation, so there is no plugins/templates causing errors.

Thanks in advance!!!

The page I need help with: [log in to see the link]