Translate problems

[rastak]

Hello forum,

I try the follow thing:
i go to backoffice > Tools > Translations > And then i select dutch for module translations.
then i translate some modules and i press save.
It says it's successful, but when i check back it's gone.

I try something else:
I download the nl.php file out of the module
i create a correct line

$_MODULE['<{savemycart}prestashop>front_save_cart_c9cc8cce247e49bae79f15173ce97354'] = 'Opslaan';

and upload id back
i check if it's on the server with Translation and they are there.
i check frontoffice and they dindn't change.

what can i do now?

Thanks