Chrysler Sailors Forum

I have a C-20 and last season was my first summer with the boat in the water. The main-sail seems to be original and the genoa looks newer. The genoa doesn't seem to fit the boat. It constantly luffs on any point of sail save a run. I have tried tightening the halyard as much as possible as well as all tensions of the sheet. Does anyone have any idea if there is anything else i could try or is the sail maybe just too big?
thanks for any advice.