Lost in Translation. (German)

I have User Visits display recent profile visitors on the Author Pane element in my Advanced Profile Kit.

The usual diction is like this:

"Name" 29 Minuten 57 Sekunden ago.

But it needs to be like this:

"Name" vor 29 Minuten 57 Sekunden.

Since I can not find the translation strings anywhere so I edited the module and changed the following:

$output .= $timestamp ? '

'."\n" : '';

To this:

$output .= $timestamp ? '

'."\n" : '';

I then updated the database, ran cron and whatnot. But my changes remain hidden. Where did I go wrong?

Regards,

Paul.