precomposition has stopped showing....
HI - I am new to AE. I have a simple composition like this, which has a precomposition within it (called pendulum)

Ppendulum displays and works fine when I click on it to open up its layers

At first I used to be able to preview and see both animations together - which is what I want,
Now when I preview I only see the first one - I cannot make the pendulum precomp appear.
Any ideas what I am doing wrong - guess its a silly
Thanks
