My Wifi connection to my Roku worked perfectly fine yesterday and last night and no one has used it at all today. And now my network will not even connect to my roku 3930X model. I have restarted my modem and my roku neither worked so i called xfinity troubleshooting for 30 minutes and they told me everything was good on their end. Please help me. I have read the forums and i do not know how or don't think i have access to my router advanced settings.