Hi Scott,
I'd suggest if you want it fixed as soon as possible you give us as much information as possible.
Not being able to SBS from a transmitter you can see is not really enough to go on
Can we start with your hardware. What tuner are you using, have you done and modifications to the base MCE setup etc etc.
Also have you searched the forums? This is not an uncommon problem.
Cheers,
Arkay.