Ubuntu Security :: Crack Own Password With John The Ripper?

I'm using ubuntu 9.10 and I'm trying to crack my own password with John the Ripper. I've been reading and working at this for a long time and I've not been able to crack my password. I've added a "test" account on my machine with the password "password": For my Unix Password:

Code:
mark@mark-laptop:~/John/john-1.7.3.4/run$ sudo ./unshadow /etc/passwd /etc/shadow > mypasswd
mark@mark-laptop:~/John/john-1.7.3.4/run$ sudo ./john mypasswd
No password hashes loaded

YES I have read the README and the FAQ and for this problem they give the following possible problems:
Q: Why doesn't John load my password file? It says "No password hashes

[Code]...