When I'm using the environment light with hdri images, it doesn't work.

Please help.!

The green background is a geometry you made, right? I would say something from the envlight is working, because you have smooth shadows and only a distantlight would always create hard shadow edges. When you hide the green background and press "Render Light Geometry", is the HDRI texture showing up?

You can also try it in a fresh and clean Houdini file with only a grid, a box and the envlight with the HDRI. Is it working there?