DHCP not working after kernel recompile

[imported_RedHat]

I recompiled my kernel (Red Hat 9), and everything went find except eth0 couldn't grap an IP. It seems like I missed something in the compile (in xconfig) that would enable dhcp, but I can't figure out what. When I run the redhat /sbin/dhclient script, it of course doesn't work, and says CONFIG_PACKET and CONFIG_FILTER needs to be enabled in kernel. Well, they now both are and I still can't grab an IP from the dhcp server (my router).

ifdown eth0
ifup eth0
also fails to grab an IP

And NIC driver is loaded and works fine. So what's amatter? What don't I have configured in my kernel?

[imported_RedHat]

Got it working now. When I set those two kernel options to 'y' and recompiled, I left out "make mrproper" the first time. Apparently, that makes a difference.