I went into the set-up menu and the tail number and hex code are correct. I got an e-mail from Dynon that said I may have to wait when I turn on the master switch until the system is completely up and running before I turn on the avionics rocker switch. That will give the unit time to load properly and send the correct signal to the transponder/ADS-B.
I will give that a try and let everyone know how that works out.
RV-12, Bakersfield, CA