htaccess

Hello all,

I woud like to add one level of protection with an htaccess.

I try to add those lines to the htaccess. allready present in my folder :

AuthUserFile /srv/www/mysite/.htpasswd
AuthGroupFile /dev/null
AuthName "Restricted Access"
AuthType Basic
<limit GET>
require valid-user
</Limit>

I've got a 500 error....

Thanks for your help.