.htaccess, AuthDBMGroupFile with mod_cas

[Umut Arus]

Hi,

I want to use .htaccess parameters by mod_cas. There is a problem about 
authentication to users. I have inserted some users to DBM group file. 
What is wrong? What is the right steps? Is there any document else Readme?

the .htaccess file,
---------------------
AuthType CAS
AuthName "CAS"
AuthDBMAuthoritative On
AuthDBMGroupFile /var/www/www/html/test/ldap2file/userdb
require valid-user
----------------------
mod_cas.conf file;
--------------------------
LoadModule cas_module modules/mod_cas.so
CASLoginURL https://xxx.yyy.edu/cas/login
CASHost xxx.yyy.edu
CASPort 443
CASValidate /cas/validate
CASTrustedCerts /etc/httpd/conf/xx-cacert.pem
CASDebug On
CASAuthenticateOnly On
--------------------------
Thanks.