enable wireless

The OS is called ubuntu, not ununtu.

Can you give the output of:

sudo lshw -C network; lsb_release -a; uname -a; sudo rfkill list; dmesg | grep -i firm

I use a D420 and everything works out of the box? Do you dual boot?

ubuntu :)
no i do not dual boot on this laptop

here is the info you requested

    description: Network controller
       product: BCM4312 802.11a/b/g
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:0c: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:17 memory:efdfc000-efdfffff
  *-network
       description: Ethernet interface
       product: NetXtreme BCM5752 Gigabit Ethernet PCI Express
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:09:00.0
       logical name: eth0
       version: 02
       serial: 00:18:8b:cf:0e:68
       size: 100MB/s
       capacity: 1GB/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.102 duplex=full firmware=5752-v3.19 ip=192.168.1.64 latency=0 link=yes multicast=yes port=twisted pair speed=100MB/s
       resources: irq:27 memory:efcf0000-efcfffff
  *-network DISABLED
       description: Wireless interface
       physical id: 2
       logical name: wlan0
       serial: 00:19:7e:42:aa:df
       capabilities: ethernet physical wireless
       configuration: broadcast=yes multicast=yes wireless=IEEE 802.11bg
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.04.4 LTS
Release: 10.04
Codename: lucid
Linux a-laptop 2.6.32-41-generic #89-Ubuntu SMP Fri Apr 27 22:22:09 UTC 2012 i686 GNU/Linux
0: dell-wifi: Wireless LAN
 Soft blocked: no
 Hard blocked: yes
1: dell-bluetooth: Bluetooth
 Soft blocked: no
 Hard blocked: yes
2: phy0: Wireless LAN
 Soft blocked: no
 Hard blocked: no
[ 17.458839] Broadcom 43xx driver loaded [ Features: PL, Firmware-ID: FW13 ]

one more question.....where is the wireless card located in my laptop??? does a black wire and a white wire connect to it?

https://help.ubuntu.com/community/WifiDocs/Driver/bcm43xx

thank you for your help but i figured it out