When you view an image in imageshack, there are links displayed.
Copy the "direct link" and use that between the IMG tags.
See if that works.
The URL will look something like:
hxttp://img714.imageshack.us/img714/2663/5cdoverallgraph.jpg
(I put the x in there so it would not transform to a link)
Note how the URL does not have anything other than the full path to the image.
The one in your message has an & sign and some extra stuff which may be confusing the PS forum software.
Good luck!
--VS
[note: I moved this thread to a board where it is more likely to get noticed, and perhaps get a better answer.]