Looks like you have most of the ?banner? code correct. You still need the opening url tag and the url of your site in front of what you now have.
[ url=yourSiteUrl][ img ][ url= ...
Note: You don?t need the spaces, I had to add them so the forum software would not try to make the text into a link.
The first url makes the image a link to your site. The second url points to the location of the image on your space, which you already have correct.