I recompiled my current kernel w/ ipnat includes:

options         PFIL_HOOKS              # packet filter hooks
pseudo-device   ipfilter                # IP Filter package

and I've got 

crw-------  1 root  wheel   18,   0 Aug 28 15:55 ipl

Now, I do 

ipnat -f /etc/ipnat.conf
and get

ioctl(SIOCCNATL): Invalid argument

Whats up?

Thanx in advance.
	Nate