I cannot even LOAD the device driver. downloaded VU20d600EN.exe from the canon website and when I try to run a "User Account Control" dialog box comes up stating "A program needs your permission to continue" I click OK and another dialog box comes up stating "You cannot install EOS 20D WIA Driver on this computer. Verify whether the required environment for use has been satisfied". Running Vista home edition. Trying to run under my computer account and I am the administrator. Please help !