Page Curl not Working

Please help a newbie here... my first generator project...

I am trying to create my first generator for showing images over and video in FCP. I can not get the page curl to show up in FCP. I have tried other filters in Motion and they show up just fine in FCP.

I have attached a zip of the motion project. Open to other advice as well....

Thanks in advance...

Tested, and no, the Page Curl in Motion does not work in a "custom" a generator.

Not even in a "custom" transition.

Why not use the regular, built-in Page Curl transition, and just keyframe the first clip's movement in FCPX?

thanks...

I wonder why the page curl doesnt work.