Not sure what downrigger release you are using but the standard little Zip Clip should be adjustable to that light of weight. If you can't adjust your release light enough, then try a different style of release. The Walker release should adjust that low and so should a Klicker (although this is more of an outrigger release). Make sure you are giving your line at least six twists before you set it in the release so that line is not pulling through from your rod tip. Set the rod tip with as much line tension as possible without releasing the line. That should pop them just fine.