Planet Survivors (AUM36) Jet not showing.

Hi, I decided to study the code from Planet SUrvivors.
It says on AUM 36 that when I hover the mouse over the ship model a blue plasma jet begins. It used to work, but now it doesn't. I recently upgraded to 6.60.
Is anyone experiencing this too?

Thanks in advance.

You can use the plasma jets from Aum65's starglider as a base for your code - they work fine with A6.60 and A7.04.