Please help with a Fedora 15 live iso?

Im having issues with Fedora. Ive downloaded it 4 times now, turned it into a live ISO, and have burned it to disk. Its not working at all. When i boot with the disk in it ignores the disks. When i put in a windows install disk, it boots to there. so i know its not the boot process. Can anyone link me a already prepared live ISO that i can d/l burn to disk and run? I would much prefer Fedora.