[Pharo-project] right click on PluggableTreeMorph doesn't select

Hi! Let's say I have a PluggableTreeMorph with some options(a,b and c). Each option may show a menu when I do a right click. Buuut, If I have selected item a, and do a right clic on c, the menu shown is for a, not for c :(. I expect the right click to work on the item the click is done, not in the selected one :(. Is there a way to have this tree morph working as I want? Thanks in advance! Guille