Why don't you list step by step what you are doing and hopefully, we'll see the problem.
For instance you create the menu in photoshop.
Then since you said you were going to use Premiere instead of AE, you create a motion background in Premiere and export it as an .avi.
You open Encore and create a new project.
You imort the PS menu "as a menu".
You import the motion background as an asset.
Open the menu in the viewer (double click it)
Alt Drag the motion background onto the menu.
Select the menu and go to it's layers and turn off the eyeballs of most ot the layers.
Set up the loop point.
Preivew it.