Use image in place (details)

I like to use icons in the details text.
When i insert image with JCE i get a question mark when
displaying the bubble.

Greetings,

Ton

Image:

I did manage to make the icon or image to appear, by changing
the sourcecode in JCE editor.
I added before /images/gmapfp/special_icons/aangepaste_badkamer.png"
However the tooltip class doesn't work. Hope we can repair that soon.

Regards Ton