What you need to do is resize your picture. It needs to be 280 pixels x 280 pixels and no biger than 98kb.

Not sure what your photo editing is, do you have a photbucket account? If not, you can set one up (it's free by the way) and upload the picture to there and then resize it there.

If you are still struggling with it pm me tomorrow and I'll get you to e-mail me the pic and I'll get it done for you.