11.3 32-bit: Can't connect to my home network

While my wireless is generally working, there’s one problem: I can’t connect to my home network through it on my laptop. My desktop (which has an Atheros-based wireless card and is configured through ifup) connects just fine, as does another family member’s laptop (also with an Atheros chip, but using NetworkManager) My laptop (With an Intel Centrino wireless chip), however, will not connect to the home router, though it can connect to public (unprotected) access points such as the one at my school. My home network is a private (hidden) network and also requires a WEP key to connect to and, as mentioned, works fine with several other systems running 11.3. I’ve attempted to use both ifup and NetworkManager and can’t connect using either method. With ifup, the connection attempt just seems to time out during the connection attempt, while with NetworkManager, it doesn’t even seem to try: I select the connection that I defined and click “Connect” and nothing happens after that. I’m using KDE and installed from the LiveCD if that help.

Are you using the WEP hexadecimal key or a passphrase? The latter will NOT work!

I was using a hexadecimal key.