how to set up DHCP for two segment network?

["高橋幸浩 [ Yukihiro Takahashi ]"]

Hi

I'm using this software

　DHCP-3.0.5

My Server installed 3NIC's.

There is 3 network segments.

　1.192.168.1.0/24 :eth0
　2.192.168.20.0/24:eth1
　3.192.168.30.0/24:eth2

I want to set up DHCP Server about 3 networks.

I did try these cases, but it doesn't work.

make 3 config files for eth0,eth1,eth2

starting deamon with this command.

　#dhcpd -cf dhcpd_1.0.conf -lf lease.1.0.log eth0

then I did try to start next deamon

　#dhcpd -cf dhcpd_20.0.conf -lf lease.20.0.log eth1

then I saw error screen like this. 

　There's already a DHCP server running.

Do you have any idea?

or Is the thing which I try to do impossible? 

Best regards.