LDAP login not working with mod_authnz_ldap

Hello folks.

I have an LDAP server on ldap.mydomain.com/
The tree is like that:

- dc=kimsufi,dc=com
| - cn=admin
| | - cn=John Doe
| | - cn=Martin Doll
| - cn=personnes
| | - cn=Steeve SIM

Code (markup):

And my configuration is:

<Directory "/var/www/mywebsitedirectory">
    Allow from all
    Order deny,allow
    Options FollowSymLinks
    AllowOverride None
    AuthType Basic
    AuthBasicProvider ldap
    AuthLDAPBindDN "cn=admin,DC=kimsufi,DC=com"
    AuthLDAPBindPassword "xxxxxxxx"
    AuthLDAPURL "ldap://ldap.mydomain.com:389/cn=personnes,dc=kimsufi,dc=com?uid?sub?(objectClass=*)"
    AuthzLDAPAuthoritative off
    AuthName "LDAP login for testers"
    Require ldap-filter &(uid=*)
</Directory>

Code (markup):

And well... When I try to log in in mywebsitedirectory (it's a virtualhost) :
In access.log :

test.mydomain.com:80 x.x.x.x - CN=Steeve SIM,cn=personnes,dc=kimsufi,dc=com [13/Sep/2013:10:17:17 +0200] "GET / HTTP/1.1" 401 672 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64)

Code (markup):

In error.log :

[error] [client x.x.x.x] user cn=Steeve SIM,cn=personnes,dc=kimsufi,dc=com not found: /

Code (markup):

I have tried so many solutions, followed all tutorials on the Internet, and I really don't know why, this isn't working.
It's my main topic of my internship. I must succeed. Plese help. I'll be grateful.
Thank you so much.