Looks like CSTV made a slight mistake here. The game should be available to UAB subscribers, SMU subscribers, and C-USA subscribers.
Go to this link here:
http://allaccess.cstv.com/media/index.jsp
Scroll down and you will see the SMU-UAB game listed with 3 sources, UAB, C-USA, and C-USA. The second C-USA link actually goes to SMU all access, so you should be able to watch it there.
If not, worse case scenario, you can subscribe to the UAB All-Acess for 6.95 and watch the feed there....they will all 3 be the same.
I wouldn't coun't on getting CSTV to fix this in time for the game, that phone number is always busy.
It appears to me though that the second misnamed C-USA link should work just fine if you have SMU-All Access.
Good Luck!