Well, it would've been nice to know you weren't supposed to be driving (been there, done that, got the tee-shirt). Basically, if you can show that your license was NOT SUSPENDED at the time of the stop, you'll be IN LIKE FLYNN. So here's what you can do:
If you feel your license was, in fact, re-instated at the time of the alleged violation stop, you need to call DMV or the state capitol (some states this applies) and find out exactly when (the day and time) they REINSTATED it. If that's on file, have them fax or mail a copy to you. Make sure it includes evidence that it was reinstated because the CHILD SUPPORT ARREARS had been paid.
Providing you're kool on that part, you'll be set. This means that you are in COMPLIANCE by the time of the court date--and in fact, you always were, it just hadn't showed up in the system yet (which can be the case) when you were stopped.
Take this paperwork including your own tax forms that shows where the state INTERCEPTED your tax refund for child support (just in case to show that you had PAID) to the court date.
The burden is on the state to show that you had been NOTIFIED of the suspension. They can't just suspend your license without letting you know ahead of time because that would violate 14th amendment guarantee of DUE PROCESS. So this means you should have received a letter in the mail to that effect. The state needs to show when and where they sent it to.
So long story, short: go to the court date armed with that the pape work and info and you should be aiiight, if you were always in compliance at the time of the stop.
Worst case scenario: YOU WERE NOT IN COMPLIANCE, you'll have to pay a fine (maybe a big one, possible jail time if you plead guilty--one can always go to trial....so see what the state is recommending for punishement too which may be less harsh than making them take you to trial). If the judge truly feels you thought you were legal, he may show mercy (that depends on the judge tho).
I work in the CRIMINAL JUSTICE SYSTEM as a INVESTIGATIVE REPORTER; and as a PARALEGAL for a CRIMINAL DEFENSE ATTORNEY, so im in COURT just about everyday for one reason or another--and I've seen this work too many times too count, however, just as often, i've seen people go down in flames when their facts or story wasn't good.
VIEL GLUCK!