enliven fly and windwalk

If I'm flying by whatever means when I call windwalk, then windwalk only gives pathfinding. That's useful, since you sometimes don't want flight to wear off when you enter a place that strips windwalk. It works fine out of form. It's only in form, when I have the half affect of just the pathfinding up, and I try to enliven fly, I get, 'You are already airborne.'. You flicker and blur into the shape of a nightengale. You maintain the hardness of your skin as you shapeshift. You maintain your speed as you shapeshift. You fail to maintain your levitation. < 614_767h 410_750m 495_495v 7 AM .wilderness.outdoor. cloudy waxing 9581x > enliven flyYou are already airborne. < 641_767h 289_750m 495_495v 8 AM .wilderness.outdoor. cloudy waxing 9581x > You are affected by: Spell: 'giant strength' modifies strength by 4 for 33 hours. Power: 'windwalk' for 20 hours. Spell: 'water breathing' for 17 hours. Spell: 'slow' modifies dexterity by -4 for 7 hours. Spell: 'stone skin' modifies armor class by -60 for 7 hours. Timer: 'scales of the dragon' for 0 hours. Power: 'unbound spirit' modifies wisdom by 2 for -1 hours. Power: 'unbound spirit' modifies morale by 10 for -1 hours.