Mixmeister, Traktor 2, shift + play btn = toggle 2 play mode value

[gaidjin]

Hi
I have a problem with setting modifiers.
have set 2 buttons, one acts as play sample deck and other acts as shift.

Play works when M1=0
If shift is hold (M1=1), pressing play change playmode value to "Looped".
Because slot play mode is not a toggle button (don't know why), I can't change play mode value to "One-Shot", when holding the same shift and pressing the same play btn.

I tried different settings (more modifiers), but I can't deal with it.

Can anyone help me with this?
Sorry for my English I hope you understood me
Thanks