TAdvGridHeaderList help needed

Hi

This is probably simple nut I'm just not getting it.

Using a TDBAdvGrid (also tried with a TAdvStringGrid) and a TAdvGridHeaderList.
DragDropSettings.OleColumnDragDrop = True
DragDropSettings.OleColumnReorder = True
DragDropSettings.OleColumnsOnly = True
DragDropSettings.OleDropTarget = True
DragDropSettings.OleDropSource = True

Grid = AdvStringGrid1

AdvGridHeaderList1.MoveAllFromGridToList; - Works
AdvGridHeaderList1.MoveAllFromListToGrid; - Works
Drag from Headerlist to grid - Works
Drag from grid to headerlist - DOES NOT WORK

What am I doing wroing wrong!!

Rudi