.htaccess .htpasswd Internal Server Error

Bonjour voila je tente actuellement de mettre un .htaccess et un .htpasswd sur mon site mais quand je vais dans le dossier protégé il m'affiche cela :

"Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, contact@power-heberg.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log."

Voici mon .htaccess :

AuthUserFile /home/XXX/www/XXX/.htpasswd
AuthGroupFile /dev/null
AuthName "Acces Restreint"
AuthType Basic
<Limit GET POST>
require valid-user
</Limit> 

Mon .htpasswd :

login:password

Help hmm merci d'avance