struggling with wireless setup

Hello.

My wireless USB network adapter (Dell TrueMobile 1180, 413c:8100) is a
802.11b compatible product. Currently in our office we use a wireless
gateway. The gateway can be configured with a web interface and it has
two modes: 802.11g mode and 802.11b mode. Currently it is on 802.11g mode.

I tried to follow this guide on wireless setup:

http://gentoo-wiki.com/HOWTO_Prism2_USB_on_Gentoo

And end up cannot obtain IP address. I think it maybe because I use a
802.11b device trying to connect to 802.11g network. Does 802.11g
network allows 802.11b device to join? If I switch my gateway to 802.11b
mode, I am afraid I would have slowed everyone else down.

Here is how I tried to connect (I have configured wlan.conf and
wlancfg-HBF to use WEP/opensystem and 10-digit Hex key, the
authentication method and key are the same as everyone else in the office)

root@esmeralda:/etc/conf.d# wlanctl-ng wlan0 lnxreq_ifstate ifstate=enable 
message=lnxreq_ifstate
  ifstate=enable
  resultcode=success
root@esmeralda:/etc/conf.d# wlanctl-ng wlan0 lnxreq_autojoin ssid=HBF authtype=opensystem
message=lnxreq_autojoin
  ssid='HBF'
  authtype=opensystem
  resultcode=success
root@esmeralda:/etc/conf.d# dhcpcd -d wlan0
Info, wlan0: dhcpcd 3.1.5 starting
Info, wlan0: hardware address = 00:90:4b:60:9c:28
Info, wlan0: DUID = 00:01:00:01:0f:26:6e:6e:00:0a:95:ea:46:82
Info, wlan0: broadcasting for a lease
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Debug, wlan0: waiting on select for 20 seconds
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Debug, wlan0: sending DHCP_DISCOVER with xid 0x593d2fb7
Error, wlan0: timed out
Info, wlan0: trying to use old lease in `/var/lib/dhcpcd/dhcpcd-wlan0.info'
Info, wlan0: checking 169.254.127.50 is available on attached networks
Debug, wlan0: sending ARP probe #1
Debug, wlan0: sending ARP probe #2
Debug, wlan0: sending ARP probe #3
Debug, wlan0: sending ARP claim #1
Debug, wlan0: sending ARP claim #2
Info, wlan0: adding IP address 169.254.127.50/16
Debug, wlan0: no dns information to write
Debug, wlan0: forking to background


P.S. If linux-wlan has a tool that I can use to scan available networks
to join, then I think I should be able to tell if it's not possible for
me to join 802.11g network by myself.

-- 
Real Softservice

Huateng Tower, Unit 1788
Jia 302 3rd area of Jinsong, Chao Yang

Tel: +86 (10) 8773 0650 ext 603
Mobile: 135 9950 2413
http://www.realss.com