bwn firmware not found

[tinca]

Hello,

I see this at boot:

siba_bwn0: <Broadcom BCM4312 802.11b/g Wireless> mem 0xf69fc000-0xf69fffff irq 17 at device 0.0 on pci12
bwn0 on siba_bwn0
bwn0: WLAN (chipid 0x4312 rev 15) PHY (analog 6 type 5 rev 1) RADIO (manuf 0x17f ver 0x2062 rev 2)
bwn0: DMA (64 bits)
bwn0: Using 1 MSI messages
bwn0: [FILTER]
..
bwn0: need multicast update callback
bwn0: need multicast update callback
bwn_v4_lp_ucode15: could not load firmware image, error 2
bwn0: the fw file(bwn_v4_lp_ucode15) not found
bwn-open_v4_lp_ucode15: could not load firmware image, error 2
bwn0: the fw file(bwn-open_v4_lp_ucode15) not found

Some threads earlier a similar problem appeared I read that. This seems to be different, as the bwn-firmware-kmod is installed (make install complains at the end), reinstall makes no difference.

This line should be present in loader.conf:
bwn_v4_ucode_load="YES" # Broadcom BCM43XX firmware
as claimed here:
http://forum.nginx.org/read.php?23,128191

It was not there originally, putting it there shows it among loaded modules, but does not help.
Moreover dmesg still reports the same. Why it insits on loading the other?

Before PCBSD installed I successfully used this hardware with FreeBSD 8.1.

Do I miss something or something was changed?

Any idea how to make it work?
Thanks in advance!