[docbook-apps] mediaobject that will display as a block

[PC Thoms]

I'm hoping to keep a <mediaobject> and <title/caption> on the same page in
the FO output to pdf.
Using Oxygenxml v13 with Saxon6.5.5 with Apache FOP.
Have tried <mediaobject> and <informalobject> without success as some of
the <title/caption> flows to the next page.
How can I avoid this?
I have

<mediaobject>
   <imageobject>
     <imagedata/>
     <title/caption/>
   </imageobject>
</mediaobject>

that I want to keep together on the same page when transformed to pdf.
Simply what I getting at the end of a pdf is the following:
<imagedata/>
page-break
<caption/>
and I want to avoid the break in between.

I have also added the formal.object.properties parameter to the list in
Oxygenxml, as it was not listed - to no avail.
With thanks
Paul