Can't get Chromecast to connect to my wifi, I have an Actiontec Q1000

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http://superuser.com – I put the Chromecast into my HDMI tv and downloaded the app to my Android phone and my Android Tablet. My laptop which is Windows Vista says it is not supported. When I try to connect to my wifi from my android devices it says it can't find Chromecast. I have researched and read that my upnp needs to be enabled on my Qwest (now Centurylink) Actiontec Q1000 modem and called century link to have them enable it, since I was not able to on my end. They said that all their modems come with upnp already enabled. So now I am stuck, How do I get my Chromecast to connect to my wifi??? Did I maybe ge (HowTos)