Setup A Wired Ethernet Connection To A Wireless Belkin Router?

I'm trying to set up a wired ethernet connection to a wireless Belkin router. The wireless router works fine - I have several devices that will connect wireless with no problem. The hp desktop I'm trying with the wired connection is showing that the ethernet connection is working, but it's not asking for the wireless network name or security code, and the internet will not work?I made sure the desktop was set up to automatically obtain IP addresses, then I did the "ipconfig /flushdns / ipconfig /release and ipconfig /renew commands, but it still won't work.