Broadcom 4315 not working

[Baby Boy]

   Hi.

WiFi BCM4315 not working. Please help me.

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# uname -a
FreeBSD  8.1-STABLE FreeBSD 8.1-STABLE #0 r211965: Sun Aug 29 22:18:05 
MSD 2010     root@:/usr/obj/usr/src/sys/GENERIC  i386

# cd /usr/src/sys/modules/siba_bwn && make && make install

# cat /boot/loader.conf
if_bwn_load="YES"

# pciconf -lvbc
siba_bwn0 at pci0:3:0:0:   class=0x028000 card=0x1508103c chip=0x431514e4 
rev=0x01 hdr=0x00
     vendor     = 'Broadcom Corporation'
     device     = 'Broadcom Wireless b/g (BCM4315/BCM22062000)'
     class      = network
     bar   [10] = type Memory, range 64, base 0xd4200000, size 16384, 
enabled
     cap 01[40] = powerspec 3  supports D0 D1 D2 D3  current D0
     cap 09[58] = vendor (length 120)
     cap 05[e8] = MSI supports 1 message, 64 bit enabled with 1 message
     cap 10[d0] = PCI-Express 1 endpoint max data 128(128) link x1(x1)

# reboot

# kldstat
Id Refs Address    Size     Name
  1    8 0xc0400000 bc14f4   kernel
  2    1 0xc0fc2000 37248    if_bwn.ko
  3    2 0xc0ffa000 a1dc     siba_bwn.ko

# ifconfig
bwn0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 2290
         ether 0c:ee:e6:a1:50:cc
         media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
         status: no carrier
....

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# kldload bwn_v4_lp_ucode.ko
# ifconfig wlan0 create wlandev bwn0
# ifconfig wlan0 up

# ifconfig
bwn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
         ether 0c:ee:e6:a1:50:cc
         media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
         status: associated
...
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
         ether 0c:ee:e6:a1:50:cc
         media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
         status: no carrier
         ssid "" channel 4 (2427 MHz 11g)
         country US authmode OPEN privacy OFF txpower 30 bmiss 7 
scanvalid 60
         bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5
         protmode CTS wme bintval 0

in series ifconfig can see:
... channel 4 (2427 MHz 11g) ...
... channel 5 (2432 MHz 11g) ...
... channel 9 (2452 MHz 11g) ...
... channel 12 (2467 MHz 11g) ...
... channel 14 (2484 MHz 11g) ...
... channel 1 (2412 MHz 11g) ...
     ...

# cat /var/log/messages
Aug 30 00:11:19  kernel: wlan0: Ethernet address: 0c:ee:e6:a1:50:cc
Aug 30 00:11:41  kernel: bwn0: firmware version (rev 478 patch 104 date 
0x8701 time 0x657)
Aug 30 00:11:42  kernel: wlan0: ieee80211_new_state_locked: pending INIT 
-> SCAN transition lost
Aug 30 00:12:09  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:12:09  kernel: bwn0: please turns on the RF switch
Aug 30 00:12:10  kernel: bwn0: status of RF switch is changed to ON
Aug 30 00:12:17  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:12:17  kernel: bwn0: please turns on the RF switch
Aug 30 00:12:19  kernel: bwn0: status of RF switch is changed to ON
Aug 30 00:12:21  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:12:21  kernel: bwn0: please turns on the RF switch
Aug 30 00:12:25  kernel: bwn0: status of RF switch is changed to ON
Aug 30 00:12:33  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:12:33  kernel: bwn0: please turns on the RF switch
Aug 30 00:12:34  kernel: bwn0: status of RF switch is changed to ON
Aug 30 00:12:35  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:12:35  kernel: bwn0: please turns on the RF switch
Aug 30 00:12:36  kernel: bwn0: status of RF switch is changed to ON
Aug 30 00:13:49  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:13:49  kernel: bwn0: please turns on the RF switch
Aug 30 00:13:50  kernel: bwn0: status of RF switch is changed to ON
Aug 30 00:14:39  kernel: bwn0: status of RF switch is changed to OFF
Aug 30 00:14:39  kernel: bwn0: please turns on the RF switch
Aug 30 00:14:40  kernel: bwn0: status of RF switch is changed to ON