Todd,
It's a common frustration with folks for the first time. Open the pic up to the 'normal' view. If you can't single out the pic within it's own page, then it won't load. The suffix HAS to end with '.jpg' in order to be a pic.
If ImageStation won't do it on it's own, here's the method: RIGHT CLICK on the pic, then choose PROPERTIES, then highlight and copy the provided URL. Paste that in the img bar when you make your post. THAT is the pic in a standalone form.
Then hit 'Preview' before sending to double check. If it doesn't load there, go back and correct something. This way you won't have wasted a posting. Hope this helps too.
Coop