Experimental not installing

[Daniel Schepler <schepler@math.berkeley.edu>]

I added the 
  deb http://http.us.debian.org/debian project/experimental/main/binary-i386/
line to my sources.list, and the Packages file is downloading fine.
But apt-get upgrade is just leaving the 2.2-alpha1-3 versions of
packages and not upgrading to 2.2-cvs20010503-1.  apt-cache even shows
the 2.2-cvs20010503-1 versions of packages.

Does anyone have any idea why this might be happening?  I'd rather not
have to go through and force apt to upgrade each package with 'apt-get
install abbrowser=4:2.2-cvs20010503-1', etc.
-- 
Daniel Schepler              "Please don't disillusion me.  I
schepler@math.berkeley.edu    haven't had breakfast yet."
                                 -- Orson Scott Card