Ok, I took time today to look at that.I installed Airport Software 2.0.4 (I had 1.2 installed, that came with OS 9.2.2). Now it kinda works better: I can connect to my network using the wep password. But that's about it: no local nor internet connection. TCP/IP control panel gives me a random local address (169.x.x.x), but my network is of the king 192.168.x.x. It does work fine under OS X, and under OS 9 using an ethernet cable, though.

Any further idea?

EDIT: sorry, I forgot to thank you all for your time and suggestions!

Click to expand...

That IP address is usually self-assigned by the OS when it us unable to contact a DHCP server. If you use the Airport utility in OS 9, and scan for networks, is your listed? I hate to sound like a Tier 1 Tech Phone Drone, but did you type in the password correctly? You should be able to use encryption with it, but stay limited to WEP.

For troubleshooting purposes, I would disable ALL security on a temporary basis and see if I could connect. If so I would work my way up from there, turning on the weakest encryption. If I cannot connect then I would go for MAC Address filtering. If that works then I would disable SSID broadcast and test again. If that works you should be reasonably secure.