Internet connection problem on Dell Precision M65 after installing Ubuntu 9.04

I installed Ubuntu 9.04 no my Dell Precision M65 machine. After the install I don't seem to be able to get any connection to the internet. I googled around without any luck. The result of executing the line: 'sudo lshw -C network' in the terminal is pasted below:

*-network:0
 description: Ethernet interface
 product: NetXteme BCM5705M Gigabit Ethernet
 vendor: Broadcom Corporation
 physical id: 0
 bus info: pci@000:02:00.0
 logical name: eth0
 version: 01
 serial: 00:0f:1f:2a:e7:d1
 capacity: 1Gb/s
 width: 64 bits
 clock: 66MHz
 capabilities: pm vpd msi bus_master cap_list ethernet physical tp 10bt 10
bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
 configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=
3.94 firmware=5705-v3.11 latency=32 link=no mingnt=64 module=tg3 multicast=yes p
ort=twisted pair
*-network:1
 description: Network controller
 product: BCM4309 802.11a/b/g
 vendor: Broadcom Corporation
 physical id: 3
 bus info: pci@0000:02:03.0
 version: 03
 width: 32 bits
 clock: 33MHz
 capabilities: bus_master
 configuration: driver=b43-pci-bridge latency=32 module=ssb
*-network:0 DISABLED
 description: Wireless interface
 physical id: 2
 logical name: wlan0
 serial: 00:90:4b:bf:7e:f5
 capabilities: ethernet physical wireless
 configuration: broadcast=yes multicast=yes wireless=IEEE 802.11bg
*-network:1 DISABLED
 description: Ethernet interface
 physical id: 3
 logical name: pan0
 serial: 26:b9:fb:ef:35:f3
 capabilities: ethernet physical
 configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A
link=yes multicast=yes

I would really appreciate any help on this matter from you experts.