How do i submit a picture on unfriendable?

well thing is, i know how to, you go to the site, you click on submit picture, you write your details, then you upload a picture, and click preview, But when i do this, it just loads a bit, then the loading bar goes away, and the [Preview] isn't like a button or something, like i can't click it or anything, and that's how it stays, Help? am i doing something wrong?