Problem with translation files

Hey mates,

quick question:
I wrote a module (which works almost correct), but i have a small issue regarding translation files. So, for some reason, my constants aren't replaced when i add strings to my translation-file.

My lang-file is stored in: /modules/mycollection/myname/out/admin/de/myname_lang.php

So. Nothing happens when i try to translate / replace the constants.

// its a backend-module, btw and I'm using oxid 4.8.6 PE

however: if i try to add lines to the file:
/application/views/admin/de it DOES translate these lines...

any ideas?

thanks,
Daniel