I need help!

Hey guys, I have a little trouble in my computers around me. I have 30 computers right now I configured for Internet Connections, and using windows98se OS. My problem is this there are 7 computers right now that cannot to the internet. I tried to check all the IP's, domains etc. all are configure fine. but when i open the internet explorer and tried to visit a site like www.google.com the message will appear "Internet Explorer could not not open the search page" whats wrong with my internet explorer? Did i miss something? by the way im still using old ie 5.0.

when i tried to ping my domain i can still ping with it and also my gateway. there is no problem with my domain and server right now. I need help on this very seriously! thanks