That was the problem.  Thanks, Matt.

-----Original Message-----
From: Matt Lundin [mailto:mdl@imapmail.org] 
Sent: Saturday, January 23, 2010 9:51 AM
To: Brody, William (Buck)
Cc: emacs-orgmode@gnu.org
Subject: Re: Secondary filtering and query editing within daily/weekly agenda

"Brody, William (Buck)" <BrodyW11@darden.virginia.edu> writes:

> I want to filter my daily/weekly agenda to only show certain tags.  The
> manual says “/” will prompt for secondary filtering.  When I try it,
> however, I get a “buffer is read only” message.  Any ideas? 
>

Is it possible that you are running an older version of org-mode? You
can type M-x org-version to find out. The current version is 6.34, and I
believe that filtering was introduced in 6.06b. 

- Matt