Well Im not sure that code is entirely accurate. that's why I asked if that's what it should look like. Did you try eliminating the gravity? I did. It gets the actor off the ground and on to the path thats placed in the air but it still won't follow nodes up or down. It's close enough for ducks flying level but probably won't help you any.

try this site for more clues path tutorials

And let me know if you figure it out