Cannot update German language file de_DE.po
I have installed the German language pack after the installation of ClassiPress. However, I have noticed that there are numerous errors in the translation. Thus, I have downloaded a software called "Po Edit" and corrected the wrong translations. Then I have uploaded the new de_DE.po and .mo files to the folder .../themes/classipress-314/languages. However, the changes dont show when I browse my website.
What have I done wrong?
Thank you for feedback!