rebol2 - Detecting right clicks in Rebol -

view layout [   box red feel [     engage: func [face action event] [       if action = 'alt-down [print "alt down"] ; 1       if event/double-click [print "double-click"] ; 2     ]   ] ] 

this code doesn't detect double right clicks.
when double click right button detect 1 click (line 1).
i've tried detecting double-clicks doesn't work on right mouse button (line 2).

is there way detect successive right mouse button clicks?