Atlanta Braves

I have access to channel 1254 on Comcast and can watch game live from home.  However, I cannot DVR the game nor access the game when I am out of my home network.  I have plenty of DVR space, have reset our connection, and have been able to access all other channels outside of my home network.  I was on the phone with Xfinity support for one hour today and ultimately they could not help or escalate.  They told me to "call back in a couple of days".  Can you provide assistance?