How to prevent PDF from displaying imported filenames instead of page numbers

Hi Bernd_Alheit 

1) If I open the page navigation pane and right-click on each page thumbnail, and select "number pages", and delete the contents of the prefix field, which is where the page label seems to be stored, then instead of displaying the page numbers on the toolbar as follows, which is how they are displayed in normal PDF files:

... it instead displays them as follows, which looks awful:

2) If I then save and reopen the resulting file, it displays the page numbers as follows, which is a bit better, but is still not what I want - which is for the page numbers to displayed the way they are in a normal PDF:

3) If I then go back to the navigation pane, right-click on the first thumbnail, select Page Numbering and change the "Style" to "1, 2, 3", then it displays the page numbers as follows, which is a bit better still, but is still not what I want:

What I want is for the page numbers to displayed the way they are in a normal PDF, i.e. like this:

The only workaround I've found to this so far is to print the resulting file using the Adobe PDF driver - but that loses the OCR'd text, which is a pain - and it's a very inelagant workaround in any case. Is there no other way to get the page numbers in a PDF file that has been created from multiple scanned images to display as they do in an ordinary PDF, other than by printing the PDF to a new PDF using the Adobe PDF driver?

Dave