Ah, sweet, sweet british cyanid ^^
Problem is, RobM's right... This is your picture, full size :
Do you honestly believe we can make out anything of it? Come on now...
Not even judging the drawing in itself, look at the way it's presented... Why is that piece of paper all crumpled? Try finding some white paper (i.e. with no lines on it), and keep the sheet clean next time (don't fold it, put it in your pocket, play basketball with it etc.), it'll make things a lot easier.
Then, follow Rob's advice and do a proper scanning. I've seen people take pictures of their sketches with a camera and get a better result. You have the tools, apparently, so use them right. Maybe you did, and you let imageshack resize the pic. In that case, look carefully at the options given when uploading...
Third thing, but that's more of a personal opinion, this is a spanking website, not dA, or any random art site, so if people could stick to spanking art... Meh, at least you didn't post it in a gallery...
That said, make some efforts and you could have your place among the artists here, someday. First lesson to become a good artist: learn to take criticism, and use it to get better, be glad someone devoted their time to write a long post about what's wrong with your upload.
And knowing RobM a bit, he's been gentle with you, haha!