Thanks for all your responses. We're looking into the issue and trying to resolve it.
It will help us if you can include some more information so we can better nail down the issue.
Please go to this page: http://xfinitytv.comcast.net/computer
And copy the "My Device Information"
like this:
My Zip Code:08052
My Cable Provider:Recommended By Comcast
Use Dac:True
My Conroller ID:100
My Map ID:24
My Persona ID:5570
My myDVR Manager Status:Activated
My Set Top Box Names: Downstairs Tv, Upstairs Tv
My Watchlist setup:False
Facebook Watchlist Syncing:False
Facebook Connect:False
My public IP address:66.165.12.210
My operating system:Mac - Undefined
My web browser:Chrome 35 - Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, Like Gecko) Chrome/35.0.1916.153 Safari/537.36
My system type: Desktop Computer Or Other Device
My Silverlight version:5.1.20913.0
My Flash version:14.0.0
Javascript:Enabled
Cookies:Enabled (2186 Bytes).
Thanks!