[Koha] how to enable different languages in OPAC

Hi, I create po file for Tamil follow the steps in translator_doc.txt, Then i choose ta in Koha administration -> System Preference -> I18N/L10N -> OpacLanguages When i choose Tamil in OPAC it won't change the interface -- Regards, Suji A. http://suji25.wordpress.com/ http://innovativegals.wordpress.com/