Many systems won't connect to such a configuration. Once the owner is done with such a setup we move to the setup noted in our Networking forum.
There is no extra security in hiding the SSID but there is plenty of downside in connection drops and more.
I'd have a chat with the person that set this up. Did they want it to work with everything and work well, easily without calling for help?
Ok, I'm having a bit of trouble. We have a hidden WPA2 Personal wireless that has to be added to your computer before you can connect. However, my computer will not connect and keeps telling me "connection timeout" or "connection failed" (when trying to connect via the menu bar) and "invalid password" when I try to connect by choosing "other airport network" through the network setup assistant. I know the password is correct, because we have two other computers (PC laptop's) in the house and thats the password they used when they added the wireless network to their computers. My wireless card is "AirPort Extreme (0x14E4, 0x4E) Wireless Card Firmware Version: Broadcom BCM43xx 1.0 (188.8.131.52)" and it definitely works because I had no problem connecting to wireless at school etc. It did connect once, so I know it works... just can't keep it up there and hasn't connected at all any time lately. I thought it was the range, because my computer is upstairs and the router is downstairs, but that makes no sense because no one else in the house has problems connecting, and I'm picking up neighbors' locked wireless. Any detailed suggestions would be greatly appreciated, thanks