Did you burn the iso to DVD as an image?
Did you boot from that DVD?
Or did you try to run that setup from your Windows XP? That doesn't work.
Hello there...i have a iso copy of windows 7 pro x64 from msdnn...and i tried to clean install my pc which is running on xp... but when i ran the setup.exe...an error came about which said the setup.exe is not a valid Win32 application