[Plugin: MeeNews Newsletter Plugin] Add my Dutch translation to MeeNews Plugin – HOW?

I’ve made an Dutch translation to the MeeNews plugin in poEdit.
But when I upload it to my server it does not automaticly detect the Dutch po-file.
How can I make my Dutch translation work?

Contact and translated po-file also available on elkana [at] elkana [dot] nl

http://wordpress.org/extend/plugins/meenews/