Sometimes ICE says, "Could not stitch together any of the input images. Please make sure your images are taken from one location and overlap one another." This means that ICE opened the photos successfully, but could not detect any visual
features that are shared between your images. Either your photos are too dark/noisy/blurry, or you selected two photos that don't share any overlap in common.
To shoot photos that ICE can stitch into a panorama, you should take pictures by rotating around a fixed position, making sure that each photo overlaps the previous one by 20 to 50%. I hope this helps.
Eric Stollnitz, Interactive Visual Media Group, Microsoft Research