samba - Jun 2003 - why is samba3.0 server showing as PDC in W2K domain?

Please advise.  I'm want to bring in Samba 3 to our existing W2K 
mixed-mode domain as a member server.
Here is my smb.conf:

realm =   DEPLOY.AK
ads server = xxx.xxx.xxx.xxx
security = ads
encrypt passwords = yes
name resolve order = wins lmhosts bcast
netbios name = tim-on-samba3
local master = no
os level = 20
log file = /var/log/samba/log.%m
socket option = TCP_NODELAY SO_SNDVUR=8192 SO_RCVBUF=8192
wins server = xxx.xxx.xxx.xxx
wins support = no
map to guest = bad user
doman master = no
template shell = /bin/bash
server string = samba 3.0beta
perferred master = no

TIA,
Tim
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