Tagline with qTranslate

My site with Simple Catcvh Pro  is in Italian and English. I get the bilingual feature using the qTranslate plugin. Everything is ok, except the tagline (site description): it displays only a language, even if, in Settings > General > Tagline, I use the recommended sintax: [:it]Description in Italian[:en]Description in English. Could anyone help me, please? Thank you