new server setup questions

[Ray]

Hello,
I'm trying to setup a new server, and I'm having some problems mostly with the 
network card. (machine specs follow) I can't get a driver to work for the 
integrated network card.  I've spent a number of hours on google / "the 
complete freeBSD" / "the freeBSD handbook". the handbook (section 11.8 
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/config-network-setup.html) 
outlines using ndis (project evil) drivers. I tried using this. I went 
through ndisgen, and everything seemed to work. I then tried to use kldload 
and got the error message:  
"kldload: can't load file.ko :operation not permitted" 
of course I did all of this as root. I am using the amd64 version of freeBSD 
(is this my first mistake?) and the 64 bit version of the drivers.
as a side note, the supplied driver disk includes a source version of the 
linux driver. is there any way to use this?
Any help or suggestions greatly appreciated.
Ray
machine specs
ASUS M2N-SLI DELUXE mobo
2GB ram
AMD 5200 x2 processor (sorry, the box isn't in front of me)