[FMX04]duplicatemovieclip and path

I have following lines inside a function

var u = clips.clip1.getDepth();
clips.clip1.duplicateMovieClip(“clip1clone”, u-1);

the problem is that clip1clone is not generated. I think it has to do something with path, I have to add somehow a path to clip1clone?
I tried 0 instead of u-1 but it didnt work so I guess the problem is with path?

Please help!