New NPSP Custom Rollup

I cloned an old custom rollup that gives the sum of gifts for an individual and I extended it to run from 2 years to 3 years back. For the life of me, I can't figure out why it won't fire. I went as far as creating a new filter group to fire off the stage of the opp instead of the "Won" checkbox (which I also can't seem to find in the Opp object). That didn't work either.