Something is wrong with my Point Sprite MAT

Hi, I’m Ken from Tokyo.
I’ve just started to use TouchDesigner and I’m trying some tutorials.

Right now I’m working on particles and I wanted to use the Point Sprite MAT.
But when I add the operator it shows up like this :
Screen Shot 2019-03-12 at 17.06.11.png

Instead of this :
Screen Shot 2019-03-12 at 17.05.53.png
which appears normally in some tutorial videos.

Have you ever seen this before and do you know how to fix it?

Thanks for your help!

The preview in the tile viewer of the Point Sprite MAT isn’t too helpful in general. What matters is the results when it’s applied to a Geometry, in the Geometries’ tile viewer, or the Render TOP. How does that work for you?