302 Found, but no redirect

I'm getting an Error 500 Page when ever my system should be redirecting
the user to the login page.

the tail of the log reads:

Processing MembersController#index (for at 2008-09-02
18:02:30) [GET]
  Session ID: 586eb1585ca3086a7445210331bbe5bf
  Parameters: {"action"=>"index", "controller"=>"members"}
  SQL (0.001000) SET SQL_AUTO_IS_NULL=0
Redirected to http://beta.cnobpyps.com/Users/login
Filter chain halted as [:require_authentication] rendered_or_redirected.
Completed in 0.00100 (999 reqs/sec) | DB: 0.00100 (99%) | 302 Found