Check to make sure the names of your files match the path in your HTML code. If your files are all capital letters and your HTML code calls them with lowercase letters they will not find the image which will cause the page to show a broken image link (red x).
You should also compare the location of the image with the location of the file on our servers to assure the path is identical. If the paths are not identical, the image will appear as a broken image. Do make sure that the image file was definitely uploaded to the correct directory and destination, and was uploaded in Binary format not ASCII.
