Question : howcan my XP computer access Internet wirelessly via my desktop?

Hi Experts
I got a desktop running XP and 2 laptops, with one running windows XP and the other one running Vista.

My desktop connects to the Internet wirelessly using "Vodafone mobile broadband". I've got a Linksys WIRELESS BROADBAND router connecting to the desktop and the model is WRT54GP2.

Both of my laptops are connected to the desktop but the connection is "local only"---i can't access Internet.

Attached is a screenshot of what i got after typing "ipconfig /all" on my desktop.

Any help please? (more points will be offered for great help)
Thanks
Ken

Answer : howcan my XP computer access Internet wirelessly via my desktop?

"my laptop has no problem pinging 4.2.2.2 "

Then you are getting to the internet, but there is a DHCP problem.....

Input your ISP's DNS entries as statically assigned, in the laptop's network connections, and then retest....