Combined files in Architect Pro 4 don't display in Adobe Reader

After combining several files into one file using Architect Pro 4, the text

does not display when opening in Adobe Reader. The data is there because
it can be viewed when clicking on the area where text is expected to be.

Is there any fix for this problem?

If PDF Architect created files are not viewable with other readers, we will not
be able to use the product.