I translated this plugin but translation is not working.

Hi

I translated this plugin but translation is not working.
I copy the translated psts-hu_HU file to the language directory bot but it does not function.

I'm not a programmer but I'm not a beginner wordpress administrator. I I know how to translate one wp plugin. All of pligin translation working the entire network, only this not wokring.

It woul be very important to work, please help

Best regards,

blaci