enable-auto-props does not work for svn:keywords

Dear Subversion community,

I cannot get enable-auto-props to work.
Specifically, I would like svn:keywords="Id Date Author Revision
LastChangedDate" on EVERY file.

The short version of the question is:
What do I need to do to get svn:keywords auto-prop to update the $Id$ text
of files already checked-in to the repository?

Details:

Here is my .subversion/config file:
[miscellany]
enable-auto-props = yes
[auto-props]
* = svn:keywords=Id Date Author Revision LastChangedDate

Now, there's file "foo" that's already in the repository, and this file
contains just:
$Id$
[EOF]

If I remove the file and then do an 'svn update', it pulls 'foo' from the
repository but does not update the $Id$ text.
If I add a blank line to the file and commit it, the $Id$ text still remains
unchanged.

How can I get the $Id$ text to expand given my auto-props?

I have tried changing my config file such that the keywords list is quoted
and unquoted, neither works.

Thank you for any help you can offer

Joseph

-- 
http://www.cs.nyu.edu/~turian/