Webmin dhcp configuration access control error

I am running a fedora 10 and need to configure the dhcp server using webmin dhcp and have encountered a Access control violation error. Here is the error message: Error
Access control violation :

Internet Systems Consortium DHCP Server 4.0.0
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
/etc/dhcpd.conf line 8: subnet 10.0.0.5 netmask 255.255.255.0: bad subnet number/mask combination.
subnet 192.168.0.10 netmask 255.255.255.0
^
Configuration file errors encountered -- exiting

This version of ISC DHCP is based on the release available
on ftp.isc.org. Features have been added and other changes
have been made to the base software release in order to make
it work better with this distribution.

Please report for this software via the Red Hat Bugzilla site:
http://bugzilla.redhat.com

exiting.


and my /etc/dhcp.conf :-

this ddns-update-style none;
#
# DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.sample
# see 'man 5 dhcpd.conf'
#
# Graphics Department
subnet 10.0.0.5 netmask 255.255.255.0 **
option broadcast-address 10.10.0.255;
option routers 192.168.0.1;
range 10.10.0.10 10.10.0.250;
}
My server have two ethernet cards, One connects to the router (192.168.0.10) and the one to my LAN which is 10.0.0.5. how do i recover from this violation error