Dynamic Send Control using modifiers

I have a pretty reasonable working understanding of CSS.

For the last 4 hours I have been bashing my head up against a wall.

Here is what I am stuck on.

I have a modifier (m1) that I am changing based on selected track. (it is being posted to AL’ s status bar to confirm change)

I have a track selector with a send that is supposed to correspond to M1.

I.E. Select Send, Use Modifier M1

IT IS NOT WORKING AT ALL.

PLEASE HELP!

I think it is a bug. I have tried on Ableton 10 and 11.