Tony,

To make a photo magically appear in the body of a post you need to link the photo from a server / web page (not your computer)

If you notice the "Insert An Image button", after you click on it, it has the HTTP:// already started.

Summary:
You added a photo link from your computer to the SynthZone.
You need to add a photo link from a website to the SynthZone.

Also the Preview Post before Submit will show if you succeeded