[Samba] cant set up a no password login

[julius]

hi
have problems to get an samba server up that offers shares for all 
without a password

heres my smb.conf file located under /usr/local/samba/lib/smb.conf

[global]
netbios name = DEATHB
server string = Samba %v on (%L)
workgroup = LANSTRIKE
encrypt passwords = yes
security = share

[homes]
browseable = no

[mp3]
comment = lmh
path = /var/glftpd/site/mp3/lame.r3mix/
browseable = yes
read only = yes
guest ok = yes

has anybody an idea ?