why does my new wireless router ask for an ethernet adapter when i have an ethernet port?

I just bought a netgear wireless n adapter. i have internet on this computer and I am trying to set it up using the disk and it says I need an ethernet adapter. Why do I need this is I have a plug in already

Michael B2009-02-23T17:59:39Z

Favorite Answer

You need a wireless network card(adapter) for any computer on
which you want to get wireless internet from your wireless router.
It is basically like radio, the router transmits the internet signal
to your wireless card in your computer.

Anonymous2009-02-23T19:11:13Z

What it's asking for is a wired connection to the router for the configuration setup. Once you get it configured, you'll be prompted to disconnect the ethernet and connect wireless.