Hello

I just finished rendering out a scene in Vue 7 and it is just the way I wanted it.  When I took it into a compositer, I noticed a problem which I can't explain.

 

The images attached show what's happening.  The image with the clouds is what the scene is supposed to look like but instead I'm getting the second one without all the clouds.

Can anybody suggest what's going on here?
 

 

Thank you