Simple vr object type movie question

I have a 36 frame movieclip embedded within the root clip. On top of that I have 2 rollover “hotspots”. When I rollover the left clip it sets the frame-- and the right on rollover sets the frame++

The movie jumps one frame in either direction on rollover. But how do I get this effect to contiue on rollover. I have tried gotoandplay and gotoandstop on rollout but my code doesn’t seem to work right.

Any help?

Ron. R. Jr.

rot_left.onRollOver = function() {
_global.step–;
_root.image.Pano.gotoAndStop((_global.step%36)-1)
}

rot_right.onRollOver = function() {

	_global.step++;
	_root.image.Pano.gotoAndStop((_global.step%36)-1)

}