If you Google the error message verbatim, you'l find lots about this. However, the answer marked as "Solved" in this thread:
usually fixes the problem.
You may be behind on software updates. The problem appeared after a security update released four years ago, and most people have worked through it with newer updates.
It might be worth asking in the Airport forums here:
I'm sure it's a setting issue but did not have to troubleshoot our wireless Macs when I set up our wiresless system four years ago. I suspect someone there will know if you need to select a different form of encryption of some other setting alteration.
I don;t have a 10.4 Mac set up that has wireless so can't check from here.
Thank you, Allan-
But it seems I've got some other issues that may be the source of my connectivity problems. There appears to be a corruption in my keychain, as it is not accepting my administrator password when I make changes to my Network preferences. I'm also experiencing some problems with permissions, etc., on my hard disk (as well as with an external USB HD), which the Apple Disk Utility cannot repair. Can you recommend a good disk repair that would take care of these problems for me, for my iMac G4 OS 10.4.11?
I'm also experiencing some problems with permissions,
Don't get too worried about permissions reports; there are a lot of "spurious" permissions reports or ones that, although correct, do not have any bearing on the proper operation of the computer. You can safely ignore most, as pointed out in this article:
Although the article talks about OS 10.5 and later, some of these will show up in OS 10.4 as well:
Note: when repairing permissions, you should do it from a normal boot, not while booted from a system CD/DVD. Permissions are part of the user/ownership system and, if booted from an external device, the computer sees no owner/user so cannot do much.
The most highly regarded disk repair utility is Alsoft's Disk Warrior (http://alsoft.com/). If you decide to buy, I strongly recommend you get it directly from Alsoft and ask before buying for a version that will work on a PPC Mac and OS 10.4. The system reqs for the current version here:
say the current DVD requires at least a 867 mHz processor so you may need to request an older version from them. On that page are instructions for how to get a version on a CD if your iMac does not have a DVD-capable optical drive, but my bigger concern getting a version that supports the 800 mHz processor in you iMac
This list of troubleshooting and maintenace articles:
has helped me many times. Might want to review ones that sound pertinent to your issues or simply bookmark it for future reference. It's close to the top of my bookmark lists.
Hi, Allan -
I appreciate your comprehensive response to my concerns. I am hoping that the Alsoft product can repair my system so that when I make changes to my Network preferences and am asked for my Administrator password, I do not receive an error message saying I entered an incorrect password.
What do you think?
Hello, again -
Thank you for your advice. I've been in touch with someone at Alsoft who is making recommendations.
I should also like to mention that one of the errors I get when attempting to load a web page concerns my DNS settings. Any idea how I can set them correctly so that I can get on the Internet? Just to reiterate, my iMac recognizes the router but that's as far as it goes (while all other devices on the network work fine).