One particle generator appears, one doesn't

I’ve created a VR environment, and I’m animating objects inside that environment.

In the lower right of the main patch is a subpatch CAMERAS.

Inside CAMERAS is a subpatch VRE_HORN_BODY.

Inside VRE_HORN_BODY are two particle generators.

The work of the left particle generator appears on my output. The work of the right particle generator doesn’t. Try as I might, I can’t figure out why. I can complete this project with the left particle generator, but the control and range of manipulations offered by the right particle generator are mouthwateringly greater.

The right particle generator started as a patch named “Simplist Particle_Example”. (I cannot find my source for this.) If I take the right particle generator and copy it into its own patch, rendering to jitworld “Showme”, it works fine. To demonstrate this is the patch “Showme”. But I cannot get it to render into the same image as the left particle generator.

Please help.