Can't preview Native HLS PixelPlane effect

Hi Joe,

I am trying to preview my custom build HLS Pixel plane effect in the PreView window. I should have set up everything correctly because I can preview a Nutcracker effect without any issue.
I add/edit HLS native PixelPlane effect without problem but when I check Display Preview only effect which is played is the Nutcracker not the HLS. Am I missing anything?

Thank you