Problem compiling orinoco driver

[stan]

I'm trying to follw the instructions at:

http://ubuntuforums.org/showthread.php?t=286621

This is for Edgy, and I'm using Fiesty, but I don't think thta's the root
cause of my problem. When I try to comiple the module, I get:

make[1]: Entering directory `/usr/src/linux-headers-2.6.20-16-generic'
  CC [M]  /home/stan/work/orinoco-0.13e-SN-14/hermes.o
  /home/stan/work/orinoco-0.13e-SN-14/hermes.c:41:26: error:
  linux/config.h: No such file or directory
  make[2]: *** [/home/stan/work/orinoco-0.13e-SN-14/hermes.o] Error 1
  make[1]: *** [_module_/home/stan/work/orinoco-0.13e-SN-14] Error 2
  make[1]: Leaving directory `/usr/src/linux-headers-2.6.20-16-generic'
  make: *** [modules] Error 2

uname -a says:

Linux yogi 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686
GNU/Linux

And I;ve got the "linux-headers-2.6.20-16-generic  " package installed.

What am I doing wrong here?

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