suspend certain using using omshell

[Ming-Ching Tiew]

By modifying /etc/dhcpd.conf, I have got this working :-

host suspended1 {
          hardware ethernet xx:xx:xx:xx:xx:xx;
          deny booting;
}

Now I am trying to do the equivalent using omshell :-

$ omshell
connect
new host
set name = "suspended1"
set hardware-address = xx:xx:xx:xx:xx:xx
set statements = "deny booting;"
create

The above is completed without any error but it is not taking effect,
ie the client with the hardware-address could still get the IP. 

Any suggestions ?