OMG. I think you don't get what everybody is trying to tell you. Don't take this in a wrong way but YOU MUST READ CARFULLY!
------INSTRUCTIONS------
(I color coded everything so it's easier to read then staring at black words and get off place! )
1st of all, You don't CHANGE THE CODE! That'll just make it really complicated for the people who are adopting! If you change the code, the adopter would have the same picture as usual. They won't want to keep on changing the code! Anyways, If you want the picture to change, you MUST change the picture. You don't use a new name, IT HAS TO BE THE SAME OR THAT'LL MEAN THAT YOU MUST CHANGE THE CODE AND I'VE ALREADY EXPLAINED IT TO YOU THAT THAT'S NOT GOOD! So... When you change your picture on your computer, go to you "upload tool" and upload your picture again. If that doesn't work, (That's what I have to face with PHOTOBUCKET) you delete your picture really fast and upload it! If you can't delete anything (that's weird if it cant...) I suggest PHOTOBUCKET!
Now do you get it?
Try that now!