[Interest] Newbie problem using Qt Assistant as a Custom Help Viewer

[h]

Hi,
I think I am doing something fundamentally wrong in setting up QT Assistant.
I have experience authoring  chm files under window using notepad and am 
trying to something similar with QT on linux (using kate)

I have written qhp and qhcp files.  These appear to work.  I get warnings if I 
reference files that do not exist and the toc appears when I open the qhc 
(collection)
I am able to search and qt assistant displays the names of the files, and the 
titles of the pages, which contain the terms. 

QtAssistant does not display me html pages.  I get "blank" and the find finds 
nothing..
My hml displays correctly in konqueror, chromium and firefox.
I have run out of ideas of how to find what I am doing wrong.

Can anyone help me please? 
 I do not know if it something  I am missing from the html or from the qhp.
Is there a schema for the qhp and/or the qhcp?  I am a bit confused by 
filters....


Thanks in Advance,

Hugh