First of all I should apologize if this topic doesn't categorize in this section.
I added my own theme as described here but after restating zimbra and checking admin panel to choose new theme this message comes: "You have modified theme properties. In order for the changes to have effect, you need to flush server theme cache. Would you like to flush theme cache now?", I just use this command "zmprov flushCache skin" to flush but the message still appears and no theme combo seen yet. what should I do now?