Unscrew the handle from the stem and then use the handle to turn the valve "ON". Check to see if the leak is through the packing or out of the small hole in the stem. If it is leaking from the stem, then the stem seat needs to be rebuilt with the parts from the 630-7755 kit. If it is leaking from the packing nut, it either needs to be tightened or replace the packing. With what you have told us, my guess is it is leaking from the hole in the stem.