first of all you need to make sure your cable is on a com port (under device manager)
if it is, then open up tunerpro then open up preferences under tools at the top
then under data acquisition click configure plug in component
then make sure the com port there matches the one on your cable, then press ok
then next to the ADX settings at the top toolbar, click the two blue arrows and see if that works, if the data is unstable (not reading correctly but still moving crazily) go ahead and click it again, wait about 2-3 seconds and try again, if not
keep retrying until you have smooth accurate data
that should be it