No background with VEGAS

Hello. I was bought the VEGAS PRO 18 SUIT Version. So I used with VFX (particle illusion) and clicked particle illusion, linked with Particle Illusion app, App was show perfectly except no background with VEGAS edited sequence. I tried for fix so many time. But same situation repeated. How can I fix this? Please help me. What’s wrong?**

Make sure the composite mode inside PI is set correctly – it’s the button next to the zoom level above the stage.


Thank you for your reply. I find it! Thank you a lot!!

Thank you also, Alan. Your suggestion has resolved the VP display issue for me as well.