KLD hello.ko: depends on kernel - not available or version mismatch

[james toy]

Hello Hackers,

    I am working on learning to write FreeBSD drivers; however, I have
some practice writing IOKit drivers for MacOSX (they are entirely
different I know!).  The code I am working with can be found here:

http://pastebin.com/m2bbb393c

and I am getting the error:

dontpanic# kldload ./hello.ko
kldload: can't load ./hello.ko: Exec format error

dmesg reads:

dontpanic# kldload ./hello.ko
kldload: can't load ./hello.ko: Exec format error

and finally uname -a:

FreeBSD dontpanic.union.edu 9.0-CURRENT FreeBSD 9.0-CURRENT #1
r198859: Wed Feb 10 09:59:54 EST 2010
james at dontpanic.union.edu:/usr/obj/usr/src_klog/sys/DONTPANIC  amd64

any information pointing me to being able to load this driver would be
greatly appreciated.

respectfully,

james toy