word rich text content control grayed out

I am willing to send my document if someone would like to help solve this issue for me. Something here or I am just asking the impossible. I even tried putting the Building Block Gallery Control inside a Rich Text and Repeating Section Content Control to allow me to select the appropriate 'Text and Table' Building Block but it is still grayed out. Having a control nested inside another control will not of itself make that control unfillable. The little green text editor is stuck wherever I last had my cursor, and when I click on the 'Find Next Region I can Edit' it is stuck in the same spot. Content controls nested inside a rich text content control have shaded tags with a long and and a short end, whereas other controls have no shading and a little arrow (I wouldnt clal it a 'dot', but perhaps you are seeing something else). So I tried the other Restrict Editing option 'No Changes' and Everyone Exceptions. I can't select the any of the appropriate 'Text and Table' Building Blocks.

Before Word 2013, rich text controls cannot be bound to an XML data node. I must be missing something here or I am just asking the impossible. A rich text control can contain custom formatted text or other items, such as tables, pictures, or other content controls. This allows me to enter text and use the Drop-Down list, but my Building Block Gallery Control is grayed out. I even tried putting the Building Block Gallery Control inside a Rich Text and Repeating Section Content Control to allow me to select the appropriate 'Text and Table' Building Block but it is still grayed out. However, as I go to the Restrict Editing on the Developer Tab and Select the 'Filling in Forms' I can now insert the appropriate 'Text and Table' in my document. So I created many Building Blocks for the Quick Parts Gallery. Users to select 'Text and Table' information to be inserted in a particular area of my document. So I have used the 'Drop-Down List Control, and Rich Text Content Control to allow users to enter information or select from the Drop-Down List the appropriate text. I have a Word document that I want the text protected.

Word rich text content control grayed out