Identify Widget pop up strange icon for hyperlink flex 2.5

Hi All,

I am using flex 2.5 and trying to hyperlink each feature to a photo. The link works and the photo pops up, however in the pop up I am getting a strange box.
Under my list of fields I get an empty box as if the image should be displayed there but its not. Inside the box is a tiny icon (image can not be displayed type icon). When I click on the icon inside the box it opens the image.

Any ideas how I get the image to show in the pop up box or get the empty box to disappear all together?

Thanks
Harriet