This is quite bizarre I think.
I can't get any of these to work as either keyboard assigned scripts in the midi editor action list or the normal arrange page action list.
I've read the instructions too and am on the latest pre-release just in case.
I wonder if there's something obvious I'm doing wrong.
One thing it could be is that I use a wacom pen and not a mouse so maybe it's not picking up on the absolute position of the pen?
Will try a mouse in a sec.
EDIT: nope, mouse didn't work either. Could it be having the midi editor docked under the arrange and synced up that's causing it?