I am trying to run a Knoppix STD program, but can't get it to start. I downloaded the ISO image and burned it to disk. I also changed the BIOS setting in my computer so that it boots to the cd/dvd drive first. After I restart my computer, I load the DVD, but the computer still boots to the hard drive. Can anyone tell me what I'm doing wrong? I have an HP Pavilion dv6627 if that helps.