get the image links from photobucket, copy and paste it here, and then change the %20 to a space then they will work... like so:
Code
http://i29.photobucket.com/albums/c266/_Megaman_/My%20Sigs/animegirl.jpg
Code
http://i29.photobucket.com/albums/c266/_Megaman_/My Sigs/animegirl.jpg