Expunge a Sealed Case in Florida ? Criminal Records, Expungement

I received an Adjudication Withheld for a Felony in Volusia County. The Offense Happened in August 14 1997. I Personally Filed a Request to have my Case Sealed, (I was Denied the 1st Time) I was approved in March 2003. It cost $75.00 to File with The Clerk of the Court. Can I do the Same thing to get it Expunged ? I have Been a Volunteer (Class A) at my Children's Schools for Field Trip, Dances, Classroom Helper Etc. For 19 Years. My Oldest Child Graduated 2 Years Ago. Now I want to Upgrade my Volunteer Status to Class A+. Which Requires Fingerprints. I Think my Case had Stipulations that I Could Not Withhold My Charge if I Wanted to Work with Elderly/Children or Pass The Florida Bar. I want to Volunteer More Now and Help the Front Desk at School, and also Do More Chaperoning in Class. In The Hopes of Obtaining a Position Working at The School to Earn an Income, and to Spend More Time With My Youngest Child. He Enjoys it When I'm in Class and Field Trips. I can Continue with Just Being a Class A Volunteer But I Really Want to Upgrade to The A+. The School Needs Help. It Would Be a "Win-Win" For Everyone. Thank You For Any Help In This Matter It is Greatly Appreciated.
Tammy