htaccess Elite

I placed a file. Htaccess and. Htpasswd in the root of my site to protect access to the site login and password and identification by the ip with the following code:

Code: Select all

AuthUserFile /home/toto/www/test/.htpasswd
AuthGroupFile /dev/null
AuthName "Site protégée"
AuthType Basic
<LIMIT GET POST>

Order Deny,Allow Deny from all

Allow from 77.1.69.257
require user toto

</LIMIT>

I have 27 users in the file and it worked very well so far, but now I wanted to add five new user and now when I connect to the site, I get an error "internal sever error.
I do not understand at all how it happens.
Thanks for your help.