New iMac doesn't connect to wireless network

[Sptz]

Hey, I bought my mother a new 20" 2.0 iMac and I can't connect to my wireless network which is a Belkin N1 router, I connect great from my Macbook Pro from across the whole corridor with 2 walls apart, the iMac is right next to that room, with just one wall separating and it always says "There was an error trying to connect to your network", and the wireless bars go to full, then empty, full, then empty. it doesn't work... I plugged in on ethernet and downloaded all software updates including an airport one, and still nothing... so I have it connected with ethernet which is a pain in the ass... 'cause of the wiring... Is it iMac's fault or what?

 

[Queso]

Sounds like your network settings are screwed. Go into your System Preferences>>Network panel, then select your Airport interface and remove your home network in the Preferred Networks panel. Restart the Mac and re-enter the details.

 

[Sptz]

Hm... gonna check that, I forgot to mention that right from the beginning when first time booted, when you configure everything, it found my network and asked for the password, I tried like 10x didn't connect, so waited until get in, and it didn't work. Oh also forgot to mention it has Tiger, didn't even come with a Leopard drop in

.. help plz..

 

[kkat69]

Make sure your entering the correct encryption passcode. It's not case sensitive but out of a possible 3-4 or however many you get, try them all.