Problem with Sinden border with Teknoparrot

I have RetroBat V6 and trying to launch teknoparrot lightgun games with Sinden lightguns.
They run fine and the control I assign trough teknoparrot seams to work but I can't make the border to show up.
I tried Alt+B shortcut to show sinden border but nothing.
I tried to force shader to the "sindenborder" from the MainMenu --> Game Settings --> Shader. Still nothing.

Anything else I'm missing ?

I did try the manual ReShade application manually witch seams to work but I would like to use RetroBat automatic feature.

Thanks