BCM4312, no ping response

Hi there, I just converted from ubuntu to freebsd - seems to be a good choice so far, BUT: the Broadcom Wlan keeps making trouble... I actually got it "up", but when I ping my router, I don't get any response whatsoever... could anyone help me - I am lacking the iwconfig-usability ;)

ifconfig says:

bwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:1a:73:22:bd:6f
        inet6 fe80::21a:73ff:fe22:bd6f%bwi0 prefixlen 64 scopeid 0x1 
        inet netmask 0xffffff00 broadcast
        media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
        status: no carrier
        ssid Leugering channel 5 (2432 Mhz 11g)
        authmode OPEN privacy OFF bmiss 7 scanvalid 60 protmode CTS

Greetings, Brunsbarth
hm.. right. But isn't the no carrier thing actually ment for LAN only, not for WLAN? The blue light is illuminated when having done "ifconfig bwi0 up ssid Leugering", though... Any ideas how to fix it?
1. ifconfig bwi0 list scan returns nothing at all

2. How do I associate an AP in BSD?

By the way: thanks for caring ;)
thanks, didn't find that particular document. I guess I did all the stuff in that tutorial, though, but still: light is on, ping doesn't tell me anything, ifconfig bwi0 list scan doesn't return anything either... Please, anybody - help me ;)
I take it, this is 7.x branch.

Could you:
echo net.wlan.debug=1 >> /etc/sysctl.conf

Then reboot and inspect /var/log/messages. If there's nothing obvious, post everything here.
Also, please make sure your AP allows unencrypted networks.