This is probably not unique to the Pi.... you need to get all your settings on the client correct to be able to connect to wifi: same encryption type (usually WPA these days, as WEP is obsolete and unsafe), same key or passphrase, same wifi channel, correct mac address entry if you filter mac addresses.... breaking it is easier, but will not get you connected....
Well, I changed the router to WPA2-PSK (AES), when I chose just WPA, the router told me I wouldnt get full N support without WPA2-PSK (AES). Anywaay, chanel was automatic... I have since set to 7 so I will try aain later and see what happens. Will pot back, would try now but I gotta wait for a secondary SD ccard... I decided to use the 16gb one I got a good deal on yesterday for my camera lol. Got an 8gb SD that should be here in the next few hrs.Ty thus far my friend !
Edit: Don't know what you mean by filtering addresses but the I know macs are eunique to the hardware connected to the rouer. Thins like IP etc though I have se to auto asign. Then I go in the router and assign to the device so only i can use said IP.
