I uploaded a few banners to SAS, and it said I had successfully uploaded. But no picture could be viewed except a cross. I had never met such problems before. I try to edit these banners but SAS said I failed to eidt. I used the formal sizes like 125*125,250*250, 300*300, 420*240, 550*480,120*90, and the format is jpg. I don't know what's wrong with these banners.