ipmi is broken? (ppc0: cannot reserve I/O port range)

[Yuri]

When I load module: kldload /boot/kernel/ipmi.ko
message appears in system log:
ppc0: cannot reserve I/O port range

Command 'ipmitool sensor' complains:
Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No 
such file or directory

What is wrong?
FreeBSD xxx.xxx.xxx 8.2-STABLE FreeBSD 8.2-STABLE #2: Tue Mar 15 
21:20:50 PDT 2011     yuri at xxx.xxx.xxx:/usr/obj/usr/src/sys/GENERIC  amd64

Yuri