hey, if you can't post ur pics it might be one of these :
#1: try changing your image hosting site. it might be corrupt or stuffed up
#2: the format of the pic might not be visible on sppf. try zamar.com to reformat the pic into something liek a JPEG.
and #3!: if all else fails, try redoing the sprite. it seems easy to do cuz i saw it on ur profile and it can easily be done. maybe even better the 2nd time?