Is is a wireless router?.
If yes,the router requires the wireless function be enabled.
When enabled the router should broadcast the routers SSID (the name of your router network)
Also you should have the wireless encryption enabled ,WAP or WAP2.You will have to create a password.
When the IPOD attempts to connect to the network,you should enter or select the router network SSID and enter the encryption password.
The password on the back of the router sounds like the user name and password for entering the router configuration settings.