[Closed] Smoothing groups + Edit Poly + faceID

Hi, i want to check smoothing groups on selected Faces of edit poly.

 
 mojNode = modPanel.getCurrentObject()
 tabFace = ((mojNode.GetSelection #Face)) as Array
 mojNode.GetFaceSmoothingGroups tabFace[1]
 

but this code not always show accurate SGroups. I think the faceID causes it
<DWORD>GetFaceSmoothingGroups <index>faceID node:<node> How then i can check faceID then?