Problem in rotating a movieclip

programming flash
1

hi ,
I am new to Flash and have a little [COLOR=black][FONT=‘Times New Roman’]knowledge[/FONT][/COLOR] in action script. This actually is from a tutorial and here i am trying to rotate a _mc(movie clip) as in tutorial they show a working swf. but actually it is not please try to help me…

onClipEvent (load) {
radius=50;
degrees=0;
}
onClipEvent (enterFrame) {
angle=degrees*(Mathe.Pl/180);
degrees=degrees + 2;

xposition=radius * Math.cos(angle);
yposition=radius * Math.sin(angle);

this._x=xposition + _root.center_cross_hairs._x
this._y=xposition + _root.center_cross_hairs._y

_root.center_cross_hairs._visible=0;
}