Cant start ipf

[Todd Gruhn <tgruhn2%gmail.com@localhost>]

I made some changes to my ipf rulebase.
Then I deleted /var/log/ipmonlog ; and did "touch ipmonlog"

/bin/ksh /etc/rc.d/ipfilter start
Enabling ipfilter.
0:open device: Device not configured
0:SIOCFRENB: Bad file descriptor
open device: Device not configured
User/kernel version check failed
open device: Device not configured
User/kernel version check failed
0:1:ioctl(add/insert rule)
0:3:ioctl(add/insert rule)
0:4:ioctl(add/insert rule)
0:6:ioctl(add/insert rule)
0:7:ioctl(add/insert rule)
0:8:ioctl(add/insert rule)
0:10:ioctl(add/insert rule)

Whats with the 'kernel-version check failed' ?
I am currently running NetBSD-9.*-HEAD