That's a known issue. Let's take for instance my favorite pundit that continues to offer advice to disable SSID broadcasting. You can't imagine how much hardware won't connect after this setting is changed.

-> What to do? Find what security works for you. At the very lowest I can implement MAC filtering and lock out the usual suspects. Next I can try the lowest bit lever WEP and test it out.

Don't expect anyone to tell you setting X and Z to work with your combo. Or that I've cured most with a router firmware update.

Best of luck with the WIFI puzzle.

Bob