[CentOS] Problem with 2.6.11.4 kernel and e1000 driver

I get the following results when I try to load the 2.6.11.4 kernel with
an Intel e1000 driver (the one that comes in the kernel source):

1) If I build it into the kernel, nothing shows up at all.

2) If I build it as a loadable module, I get errors on eth0 and eth1
that the MAC address is different than expected, and it ignores the
controller.

What's up with this?

Thanks.

mhr