wis, when you upload your pictures to Photobucket, you want to copy the Direct Link...it's the second one down in the list.
Then come here, click this icon on your post tool bar.

and paste your URL there when the window opens. Delete the http:// that is already in the window that opens and paste yours. That's all I did to make your photo appear. I copied your URL, opened the image add icon window, pasted it and bingo.
PS. so you know, and others...there is a test forum for testing threads like this.