Translation Not Working

I have good experience in translating of many plugins for WP.
I started to translate this plugin. I usually translate strings for user message (for front-end) first because administrator messages are for back-end and I think administrator should understand original English.
Anyway, based on your asgaros.pot, I translated and made PO/MO files under language folder but it does not work. I do not know the reason why but I remember your previous version(before 1.3.9) worked in translation.
Will you please check and advise?