How about starting from the beginning and be more precise about the steps you have taken and more information about the versions of the software you are using and going to.
For instance, you have a copy of Windows x64 what, Pro, Ultimate.....?
You are currently running Vista x64 (or 32) version Home premium?
I am assuming you have internet access.
Did you download a .iso image and burn it that way, or make an .iso from downloaded files?
You know, things you might need to know to be able to answer the question.