system.privilege.admin problem

Good afternoon. Please excuse if this has already been asked and answered, but after searching for a few days I still haven't found a fix for this:

After I had to wipe the hard drive on my G5 (don't ask), I reinstalled the OS from the DVD and then used the setup assistant to migrate all my files from my (mirrored) MacBook Pro. Now the application that runs my wireless broadband modem starts up, recognizes the modem, which is getting reception and shows up on Sprint's network (their tech support confirms), but *asks for my admin password, noting that it's necessary for "system.privilege.admin"* I give the (confirmed) password. At that point I get the spinning beach ball for a few seconds, then nothing at all happens. It doesn't freeze, mind you. It just goes back to idle. The same modem works fine with the same software on my laptop.

*How do I fix my "system.privilege.admin"?*

I had to reauthorize my Adobe Creative Suite, too, incidentally, but that took immediately.

Here's what I've already tried:

--Repair permissions
--Un- and reinstall the software
--delete plists associated with Sprint's SmartView software
--create a new user account with admin privileges (beyond my main account that has admin privileges, too, of course)
--confirmed firewall settings as "allow all incoming connections"

None of these had any effect on the problem.

Thank you for your time. I hope you can help.