pam_radius_auth accounting configuration

I am using pam_radius_auth 1.3.17 and I am having difficulty getting accounting to work. I have defined a service called openvpn in /etc/pam.d and the config lines are below auth required /lib/security/pam_radius_auth.so debug session required /lib/security/pam_radius_auth.so debug account required /lib/security/pam_radius_auth.so debug I have also created /etc/raddb/server and put in radius_server_ip:port secret time_out. The authentication piece works fine, but we don't see any accounting packets being forwarded to the radius server (Microsoft IAS 2003). Thanks, BW