Browse the DVD and tell us if you see a single ISO file or a series of files and folders. If you see the former you burned a Data DVD rather than a bootable DVD created from an image file, so you'll need to re-burn it in the expected form.
I downloaded the windows 7 64-bit for my emachines and burned it onto a DVD+RW. I restarted the computer and it just brought me to the bootloader(i have ubuntu and Xp installed). I changed the boot sequence to boot from cd/dvd drive and it still isnt working.