Opening form PDF from InDesign in LiveCycle Designer E2

I have a student who sent me an email about a problem he has using LiveCycle Designer E2.

He created an interactive PDF with what I assume is a ListBox or ComboBox in InDesign.

The form (and other elements) work fine when opened in Acrobat.

But he needs to open the PDF in LiveCycle Designer E2 to "add image field".

I don't know enough about LiveCycle to answer his question.

1. Does he have to use LiveCycle to add that image field? Is that something that InDesign could do?
2. Does anyone know of problems when opening existing PDFs with forms in LiveCycle?
3. Is he using LiveCycle incorrectly?

Any help is very appreciated.