Accessing Wireless Secure Network from Laptop

Hello -- I have a secure wireless network at home, but reset the router and use a new passphrase etc, and now my laptops can't connect. In fact, the network is visible, but when I try to connect the laptop, I don't even get the option to enter the key. When I try to access the other secure ones that are visible, I get the box to pop up and ask for the key. Any help on how to set up a) the two laptops and b) an I Touch on an already existing secure wireless network in my house?

A few times it has said that the cable is disconnected, but as far as I know the internet is enabled on the front of the laptop. Before I secured the network again, the same laptops could access the unsecured linksys network that I had temporarily.

Help. Thanks.