Restricted users don't rejoin AirPort out of sleep

Question

Since I set up my new Mac, I've had a problem with Airport and security settings. If I come out of sleep if logged on as an admin user, the Mac joins my Airport network. If I come out as a restricted user (a kid), it asks for an admin user and password.
The Network is set to "By default, join Preferred Networks" and I have only one preferred network. The network is there. There's no WEP or WPA or other password required. (I use MAC address filtering). It happens whether or not the Options are set to "Require administrator password to [ ] Change wireless networks."
This has been a problem since the first time I setup the users. The article below claims it's a problem with old releases but I have the latest release.
I've been a Mac users for 20 years and an OS X user for 3. Any ideas?
http://docs.info.apple.com/article.html?artnum=301530
Mac OS X 10.4: AirPort may not rejoin network on wake or restart
Symptom
Some computers, after upgrading to Mac OS X Tiger 10.4, may no longer automatically join a wireless network after waking from sleep or restarting.
iMac G5   Mac OS X (10.4.8)  

Answer 1

On the screen where you are being asked for the password, click the triangle by Details and note down what the requested right is. From here, use an application such as TextWrangler to open the /private/etc/authorization file, search for instances of that right, and if possible, modify the file so that non-admin users have that specific right. If you're not sure what to do, post back with the requested right for instructions. General information about the setup is available in another thread.
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