PPCGeeks - I get trouble in internet sharing

I have two ppc UT xv6700 and gigabyte t600.
My t600 do well in internet sharing.
But xv6700 can't do this because it has not the intshrui software,
I copy the intshrui.exe and intshare file to xv6700,
and it can run and connect my laptop,
but my laptop can't get the IP address,
so I set the ppc address to 192.168.0.1,
and the computer address to 192.168.0.200,gateway is 192.168.0.1
after that, I ping ppc in my computer sucessfully,
but fail to ping www.google.com neither the dns server 202.112.14.151
I think it is because the dhcp server and nat server are not running.

any idea?
(sorry, my english is poor)

now I install enable dhcp
and found a driver object named nat0 is missing
to install nat0 driver object, I need a dll file named ipnat.dll,
I can't copy it out from my t600,
any idea to get this file?