wifi card not recognised properly

[Nigel Wilkinson]

Hi folks

Every thing worked fine on Xubuntu 6.10 but since I upgraded to 7.04 I
seem to have lost the wireless card

If I do
sudo lshw -C network

I get 

nigel at henry:~$ sudo lshw -C network
  *-network:0 DISABLED    
       description: Ethernet interface
       product: Prism 2.5 Wavelan chipset
       vendor: Intersil Corporation
       physical id: 2
       bus info: pci at 02:02.0
       logical name: wlan0
       version: 01
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master cap_list ethernet physical
       configuration: broadcast=yes driver=p80211_prism2_pci
driverversion=0.2.5 latency=64 link=no multicast=yes resources:
iomemory:ec000000-ec000fff irq:11
 *-network:1
       description: Ethernet interface

now for some reason this is showing "disabled". The laptop is an IBM
T23 and I know that the card is not disabled in BIOS as the machine is
dual boot and ubder windows its fine.

Can anyone tell me how to enable this card.

Cheers
Nigel