ABDE Text Rotation Z

i don't know why AE read the X and Y rotation and not the Z rotation on my text layer propreties.

i m using this code

            animator1.addProperty("ADBE Text Rotation X").expression='effect("X Rotation Control")("Angle")';

            animator1.addProperty("ADBE Text Rotation Y").expression='effect("Y Rotation Control")("Angle")';

            animator1.addProperty("ADBE Text Rotation Z").expression='effect("Z Rotation Control")("Angle")';

i add an expression to the Z rotation of the text layer but it do this for the X and Y rotation but it doesn't add the Z rotation

anyone know why?

tnx