Error message 721 for sports on Regional Sports Networks

Hey everyone.

Switched to DirecTV last month and I'm paying $7 for a "regional sports fee" which, according to DirecTV's website is to make regional sports networks part of my base programming to provide coverage of local sports teams.  One of those channels that I'm paying for (and is listed on the channel guide for my ZIP code) is Comcast Sports Net Chicago.  I have access to that channel when there's regular programming on, but whenever there is actually a game on I receive the error message 721, which the website says means that the channel is not included in my programming.

I talked to someone at DirecTV two weeks ago and they were going to escalate my issue and get back with me.  Well, that never happened, so I'm turning to you guys.

Is there something wrong with my programming or is this the way it's supposed to work?  If this is normal, why on Earth do I have to pay a regional sports fee for access to a channel that still doesn't show any games?  And why would I be seeing the 721 error message instead of something else?

Thanks for any help you can provide!