Anyone know how to move a layer set (group) into another layer set using applescript?

The following code returns a parameter error:

error "Adobe Photoshop CC 2014 got an error: Parameter error." number -50

tellapplication "Adobe Photoshop CC 2014"

     activate

     tellcurrent document

          setparentLayerSettomakenewlayer set

          setnameofparentLayerSetto "parent"

          setchildLayerSettomakenewlayer set

          setnameofchildLayerSetto "child"

          movechildLayerSettoendofparentLayerSet

      endtell

endtell

anyone know a solution?

Cheers!