Schedule for ESPN College Extra channels?

Yesterday we got three months of the DirecTV "Sports Package" that includes ESPN College Extra. ESPN College Extra apparently broadcasts live games (only?), so that means there's something to watch mainly in the evenings and Saturdays.

But looking at the DirecTV online guide, it says "Programming information not available" on every channel (788-798), all the time, even on Saturdays!

Is anything ever on these channels? Is there a way to see in advance what will be broadcast? 

Thanks,
Russell