3130cn wireless adaptor installation

printer  has been working fine. I just purchased a dell wireless network adaptor.

No installation disc came with it. I am running W7 64bit. The  network adaptor auto installed on the printed but I can't find any software that installs the adaptor to the network.

I called Dell and they suggested  downloading the application file. I did  and when running the setup it only installs the drivers. there is no "install wireless network) The book says use the installation disc and choose install wireless adaptor.  No such thing exists.

Can anyone help?