Connecting To Network - Help!

I have a NETGEAR home networking router thingy in my house, and my laptop is connected to that fine.
My ipod can find this network, but when i enter the wireless network key, it says its 'unable to join the network 'netgear'. i have absolutely no idea in the world how to fix this or what to do. i really need some1 to talk me through it. i havent an ip address or anything..... i dont think.

please help!!

 

urm.. i rli dont know how to distinguish between wep or whatever other option u gave me if u tel me how to find out i will.. im not computer illiterate i just dont understand this one bit!!

xxxxxx
i appreciate the help tho! xxx

 

AAAAHHHH i've searched thru a load of properties and my network authentication is 'WPA-PSK' so i guess that means i'm a wpa thingy?? xx