Well, I could tell you but then you would not learn anything now. That's an annoying but true statement.
Here is a *big* clue.... use the "preview reply" button to see what your post will look like before it is posted!! That also allows you to test links and images! Messing with all the IMG, "http://" stuff is good, but the bottom line is to test your post before you submit it using the preview reply. Of course, if you are starting the thread a better name for the button is "preview post", but that's just semantics.
Regards,
Malta