Error 1068 on starting DHCP service

I have a Windows XP with Service Pack 3. When I check on the Dynamic Host Configuration Protocol (DHCP) service, it stopped automatically. And when I start the service, nothing happens. It only shows this error: “Error: Could not start the DHCP Client Service on local computer. Error 1068: The dependency service or group failed to start. How can I fix it? Please help.
