Okay.......use this URL:
http://img263.echo.cx/img263/3470/hq168jb.jpg
Highlight it and copy it to your mouse thingy.
Then type
< img src=paste the URL here >
and be sure to remove the space AFTER the < at the beginning and the space BEFORE the > at the end
It should look like this:
< img src=http://img263.echo.cx/img263/3470/hq168jb.jpg >
but without the space after the < at the beginning and the space before the > at the end; then preview it. You should see the picture in your Preview box.
If that doesn't work, come back and we'll figure another way!