IE “Page cannot be displayed”

IE 5.50 on W98. No DNS error number shows on the error page, ie: 400, 500 etc. Can’t ping Cable router gateway/DHCP, but gets/refreshes DHCP address. Both the Security and Advanced tabs are missing from IE Tools/internet options/. He has “Content Advisor” turned on, I tried disabling it w/o luck. I REM’d out Load=PTSnoop.exe and Run= C:\windows\system\cmmpu.exe from win.ini. I plugged this PC into my home Router and cannot map via address to my own PC, yes they are different workgroups. Any help would be appreciated. Thanks.