|"Yes, followed instructions"|
OK, I'll take your word for it. Did you see the following on the page I linked to in my other response?
Please note: Your Wi-Fi network configuration may prevent you from setting up Chromecast successfully. If you are having trouble connecting Chromecast to your Wi-Fi network, please see our Chromecast Router Compatibility list HERE.
If you're still having trouble, please visit our Chromecast troubleshooter HERE.