Can't access web site on networked computers

Hi everybody and Happy New Year!
While on vacation in Jamaica I was suddenly unable to access the Easynews search web site on my netbook running window7 starter. I figured perhaps it was somehow being blocked by the hotel network. All other web sites seem to be fine. When I got home I still couldn't access the web site so I called Easynews support. He asked what browser I was using and I told him IE. He suggested I try firefox. On our main computer we run firefox and I was able to access the website. So I installed firefox on my netbook but STILL wasn't able to access the site. I would get "DNS server unavailable".The 3 other computers on the wireless network also can't access the web page. The only computer that can access it is our main computer which is running windowsXP. All the other computers are running winsows7. Is this a network issue? It can't be an Easynews problem as I can get it on the main computer. Any ideas?
Thanks

 

The XP computer is not wireless and the 3 Win7's are wireless? Do you have your IP settings set to static? Do you have the XP machine attached to the same router as the other computers?

Copy the ipconfig /all here for the XP machine and one of the Win7 machines.