XP Home can’t access cj.com or qksrv.com

My wife’s PC, on the same home network, runs Win 98 and it works, fine.

I can get to these sites only if I enter the IP address in MSIE.

I’ve tried Netscape navigator and that doesn’t work, either.

It’s almost as if there is a setting on my PC that denies these domain names.

Assistance appreciated.