Why does auth_log return fail?

On May 4, 2013 8:04 PM, "larry tembu" <larrytembu@yahoo.com> wrote:

a few weeks ago, the configuration was working and authenticating, but it suddenly stopped.

[auth_log]      expand: /var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d -> /var/log/radius/radacct/11.0.0.205/auth-detail-20130501

[auth_log] /var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d expands to /var/log/radius/radacct/11.0.0.205/auth-detail-20130501

[auth_log]      expand: %t -> Wed May  1 17:46:27 2013

++[auth_log] returns fail

Using Post-Auth-Type REJECT