Apologies, I just looked at the code for this page and found the reason why your image didn't appear.
You must have copied and pasted the image link in from somewhere where the code was split on two lines. Then, when you pasted the code here, the forum submission tool inserted a <BR> tag in the middle of your code because it recognised that your code was split on two lines.
It sounds complicated but was a simple error. Hope this made sense!