samba anonymous user account?

[Provider]

ok how do i set up an anonymous user account (no password) on my samba server so anyone can hit the shares in a specified directory? I have it set to share level security and a directory:

[public]
comment = Public Shares
path = /home/yoda/shares
read only = no
guest ok = yes
browseable = yes

got my info from groups.google. I can see the directory just cant browse or copy to it. It says:
"CORUSCANT\PUBLIC IS NOT ACCESSIBLE"


Please Help........