ESPN not streaming live.

Last night I tried watching sportscenter, and the NBA playoff game on xfinity stream through a desktop. Today I'm trying to watch sportscenter. When I click to watch, it automatically starts some other on-demand sports program. Same episode every time it starts from the beginning. ESPN will not play the live program that on the TV guide. Also ESPN 2, same thing. Only happening on a Desktop computer. It works on my phone fine though. Any thoughts?