How do I update a missing directory?

Dear Experts,

How do I update a missing directory? For example, assume that my working
copy has a directory foo with sub-directories A and B. I have deleted foo/B
using rm -r so that when I update foo, I don't have to wait for all the
updates to B. Now that I want to get updates to be, I'd like to get foo/B
back. Unfortunately, svn update foo/B says something like "At revision 1500"
but doesn't actually do anything. Also, "svn revert -R B" says "Skipped 'B'.

Thanks for your help,
-Emin
Received on Tue Jul 10 17:27:55 2007