Ok. Having a bit of trouble ?
First off your banner must be 750 x 90 in size. (Maximum).
You have to use a image uploader such as IMGUR. That's the one I use. You can't have your banner just on your hard drive unfortunately.
Then you have to make an account there to upload your banner.
After that is done, click on that image and a list should come up showing links to that particular image. The first on the list is the image link, this is the one you have to copy.
Goto Profile in this forum and then select Forum Profile Information. Near the bottom you'll see SIGNATURES. Mine looks like this.
And then at the bottom of the screen on the right hand side click Change profile. And it should work........... hopefully.
I've also just noticed what you have as your banner. You've missed the / out on the 2nd img. The first one is right the second one should be [/img]
Ok the image above isn't very plain, but if you're using Chrome zoom it up a bit. Comes up pretty good then. Hopefully the next time I come on here you'll have a brand new banner showing in all its glory.