First post here, hoping I'm in the right forum. I've brought home a smart new iMac 21.5" and it's lovely. But i can't get it to 'talk' to my wireless router. I've been into the router controls and added the MAC number of the iMac and even followed suggestions to change from WEP to WPA encyption, so it all looks good from that end. When I click on my network on the drop-down list, I am asked for the WPA password but entering it results in a 'connection failed' message. If I remove all security from the network, so that my ageing creaking PC can log in without a password, the padlock symbol disappears from the iMac's network list, but I still can't connect. Can anyone advise me, or should I contact apple's technical support? the router is ZyXel 600. iMac is running Snow leopard 10.6.3. It's doing my head in!