Showing image on a TListView

I am trying to use the TListView mimick the lists presented on an Outlook
right-hand pane.  I have my listview set a vsReport and have 4 columns set
up.  I set the image index on the columns to the appropriate image index in
an imagelist.   I have all three image properties of the listview
set(large, small, state).  
Currently, no image displays.  I assume since the image index is available
that the ListView utilizes it and acts accordingly.
So now my question is why is there no image displayed? Which of the image
properties is it supposed to use?