authentication.conf question

[TPJ]

Hello.

I have a problem with authentication when I use bzr+ssh. I'd like to
do simply

$ bzr pull bzr+ssh://bazaar.launchpad.net/~some_user/path/to/branch

instead of

$ bzr pull  
bzr+ssh://some_user@bazaar.launchpad.net/~some_user/path/to/branch

without being prompted for password. There are two things to notice
here:

1) I have to tell bazaar the username to use.
2) I have to tell bazaar the password to use.

I failed to do the both.

I created the file ~/authentication.conf with the following content:

-----------------------------------------
[DEFAULT]
scheme=bzr+ssh
host=bazaar.launchpad.net
user=my_user
password=my_password
-----------------------------------------

but it didn't help.

What did I do wrong?

(I use Bazaar 1.3 on a GNU/Linux box.)