It could be that the objects that you try to access in your form are "hidden" for the users. I had a toolbar with buttons that I couldn't map because we were in a case of blackbox testing (
BlackBox/Whitebox testing). In our case we could access to the items of our toolbar but not their properties with the wItem property of our toolbar.
Try to seek from the properties of your form if you can see the objetcs in it with either child or Item properties. You will maybe not be able to map those objects but have access to them and interact with them through your form properties.
Hope that will help, and sorry for the bad english,
Nassim