Can't create a branch

[Octavian Râşniţă]

Hi,

Under Windows XP, using Mercurial Distributed SCM (version 1.3.1) 
I have tried to create and see a branch, but I couldn't do it.

Please tell me if I am doing something wrong or missing something:

E:\lucru\mercurial>md xxx
E:\lucru\mercurial>cd xxx
E:\lucru\mercurial\xxx>hg init
E:\lucru\mercurial\xxx>echo foo > file.txt
E:\lucru\mercurial\xxx>hg commit -A
adding file.txt
No username found, using 'Octavian at teddy' instead
E:\lucru\mercurial\xxx>hg branch stable
marked working directory as branch stable
E:\lucru\mercurial\xxx>hg branches
default                        0:3a959d20bb1d
E:\lucru\mercurial\xxx>hg update stable
abort: unknown revision 'stable'! 


Thank you.

Octavian