I have a problem with the hardware broadcom wifi.

I press the hotkey fn+f2 to activate the hardware and this will not work.

I'll look at the drivers but it appears to be installed.

How can I solve this problem? Ubuntu is all new to me so if possible, give me a clear explanation. Now do I connect the lan cable. I use the Ubuntu 11.10

lawrence@lawrence-Vostro-1000:~$ sudo lshw -class network
[sudo] password for lawrence: 
PCI (sysfs)  
  *-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: eth1
       version: 02
       serial: 00:1c:23:a2:b9:a9
       size: 100Mbit/s
       capacity: 100Mbit/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=full ip=192.168.1.18 latency=64 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:21 memory:c0300000-c0301fff
lawrence@lawrence-Vostro-1000:~$ 
lawrence@lawrence-Vostro-1000:~$ rfkill list all
0: dell-wifi: Wireless LAN
    Soft blocked: yes
    Hard blocked: yes