Rails - Oct 2005 - User_id object to string

I''m extremely new to Ruby/Rails and I''m attempting to use
Richard Livesay''s
Created_by/Updated_by extension with the LoginGenerator.  I''m very
close
but continue to get the same error.

Couldn''t find User with ID=#<User:0x5700bb8>

The error is in the application.rb controller.  It has the following line:

User.current_user = User.find(c.session[:user]) unless
c.session[:user].nil?
>From what I can determine, I think that I''m giving the controller
an
object, when it is looking for a string representation of the User id.

I''ve tried this:

User.current_user = User.find(c.session[:user].id) unless
c.session[:user].nil?

And I get an error saying that there is an empty string.  So, I thought
that perhaps I wasn''t storing the id in the session, but I''m
able to
display the id on the session using:

<p>Welcome <%= @session[:user].id %>

Does anyone have any clue what I''m doing wrong?  I guess I need to
change
that User reference into a string somehow, but I don''t know how. 
Thanks
for any help.


Regards,
Joshua Schairbaum