For a couple of years I have been programming my DVR through my computer via Xfinity "Watch on TV". Thispast week I keep getting error feedback also indicating it is a problem on Comcast's end and the problem is being "fixed". I use FireFox as my web browser. Have never had any difficulty before. I got to the same point using Internet Explorer and was able to access the TV schedule and program by DVR. What's Up?