LAN users never asked to authenticate

[alltime]

Although Captive Portal is enabled, our users are never redirected to the authentication page.  Even though both "MAC filtering" and "Pass through MAC automatic additions" are disabled.

PFSense's Captive portal appears to be properly set-up and our Windows Server 2008 is successfully set-up for RADIUS (Followed this http://www.bunkerhollow.com/blogs/matt/archive/2008/06/04/configuring-server-2008-for-radius-authentication.aspx).

I successfully set this up a few months ago but disabled because we had other infrastructure work.  Even if RADIUS wasn't configured properly, shouldn't users be redirected portal page regardless?  I can see that there are IP's are being issued and traffic activity so there are definitely active users.  I look forward to your assistance.

PFSense Captive Portal Configuration