Yes, go to rudder school, and take a refresher course.
Most planes with little dihedral, and a low wing will just yaw when rudder is applied, however the "Rascal" you speak of is a cabin type high winger, yes?
Check for proper dihedral, and rudder throw, and perhaps move the C of G back just a bit.
Are you just stuffing in some rudder, and expecting it to turn instantly? You may just need to be a little more patient, feed in the rudder, and wait for a second or so. My G.P. Spirit glider take a second or so to react, and if you just hit the rudder for a second, it to will just swing the tail over, then it swings right back.