[Click] questions about dhcp package for click

[kevin zhou]

hi kohler
I'm a user of click, recently I'm adding dhcp package to click, but
just meet some quesions.
I' m so glad if you can help me, thanks.

I downloaded click and dhcp package from http://read.cs.ucla.edu/click/cvs .
The question is that when I use the server.click in
dhcp/conf/server.click, the following error msges are shown:
#click server.click
#server.click:6: unknown element class 'DHCPServerLeases'

I do lots of work to find 'DHCPServerLeases', but didn't found.

Could you help me how to write a dhcpserver  conf file for click?

Thanks