How To Delete Wireless Network

i created a new wireless network by going to network instrastructure and right clicking on pk5000z ap and configure. then set up a network pop up asking for 8 digit pin from the router label i typed the pin in. now that i made a new network the new network shows up instead of my old network.i cant connet to my old network even if i type it in manually. ive tried to delete the new network in manage wireless networks. but it still shows up.