Cannot use System Pref's/Network -- dialog box won't go stay gone

Question

G5 running Tiger, browsers, Mail and other internet functions (DSL, PPPoE) work fine BUT: if I boot the Network app in System Pref's, it shows a dialog box that says "Your network settings have been changed by another application." If I press OK the box goes away for a second and then returns -- there is no way to proceed, or use this app -- the only thing I can do is for Systems Pref's to quit. In other words, it won't take OK for an answer!
Some notes: 1) Network diagnostics from the Help menu says everything is normal. 2) I did move my Ethernet connection to another computer to run that one -- this Mac was off at the time. I did not change any modem or router settings, and this Mac, as I said, works fine except for the above problem. 3) an app called "Internet Connect" in the apps folder will not boot (don't know what this is); 4) the utilities Netinfo Mgr and Network Utility don't tell my anything useful or at least that I can understand. How do I reset the SystemPref's/Network app or whatever it is so I can use it? Thanks.

Answer 1

Hi,
Check out this thread: file:///Users/carolynssamit/Desktop/Mac%20Troubleshooting/Your%20network%20setti ngs%20have%20been%20changed...%20%20fix.webarchive
And here: http://forums.macrumors.com/showthread.php?referrerid=59552&t=592305
And more here; http://forums.macworld.com/message/666874
Carolyn