Ubuntu problem: my wifi doesn't work help me plz

I have dell inspiron 1501 I just installed Ubuntu 9.10 through Wubi. But I cant get my wireless to work. When I look at the top right icon it says device not ready or something like that this is what I got when I typed in the -C netwrok command:

*-network
description: Network controller
product: BCM4311 802.11b/g WLAN
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:05:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=b43-pci-bridge latency=0
resources: irq:18 memory:c0200000-c0203fff
*-network
description: Ethernet interface
product: BCM4401-B0 100Base-TX
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:08:00.0
logical name: eth0
version: 02
serial: 00:1c:23:a0:89:ae
size: 10MB/s
capacity: 100MB/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=b44 driverversion=2.0 duplex=half latency=64 link=no multicast=yes port=twisted pair speed=10MB/s
resources: irq:21 memory:c0300000-c0301fff
*-network DISABLED
description: Wireless interface
physical id: 2
logical name: wlan0
serial: 00:1d 9:0b:ee 3
capabilities: ethernet physical wireless
configuration: broadcast=yes multicast=yes wireless=IEEE 802.11bg


So can anyone help me get my wifi working.