How to use shelf1?

[Óscar Fuentes]

After editing some files, I shelve the changes:

bzr shelf --all

oscar at qcore:~/dev/other/bzr-emacs/trunk$ bzr shelve --all
Selected changes:
 M  INSTALL
 M  README
Changes shelved with id "1".

Now I try to see the contents of the shelve:

oscar at qcore:~/dev/other/bzr-emacs/trunk$ bzr shelf1 list
Patches on shelf '1': None
oscar at qcore:~/dev/other/bzr-emacs/trunk$ bzr shelf1 switch 1
Default shelf is now '1'
oscar at qcore:~/dev/other/bzr-emacs/trunk$ bzr shelf1 list
Patches on shelf '1': None

What I'm doing wrong?

-- 
Óscar