DNS Error cannot find server wireless Belkin G+

[Pixie_0]

Please help! Im completely confused.

My flatmates have Homechoice broadband and yesterday they added a Belgin G+ router so we could get wireless around the house. It was great, I surfed the net on my Dell laptop for about 3 hours no problems whatsoever.

Then it stopped working for me. THeirs connects fine to their laptop, but now everytime i try and search a page it says "cannot find server" and when i try connect something like windows messenger it says that the DNS cannot connect with the IP or something like that. It shows FULL strength connection in my system try under my wireless, but everything tells me that there it cant detect a connection to the internet.

I have rebooted my pc, rebooted the router and it just doesnt change anything.
Please can someone help.
please please please

oh, i can connect to my parents wireless network no problem.