Since I had some trouble with viXen's installation program that pointed to my drive D:,
I re-installed the entire xblite workbench on drive C:.
I reverted xblite's installation to C: because I was experiencing troubles with no sound reasons:
viXen's install procedure at SourceForge was pointing to D:!
If you are using another drive than C:, I suggest you also revert you installation to the C drive.
Don't forget to run again C:\xblite\bin\install.exe to update Windows registry, so that the environment variables point to C:.
Sorry for hinting you that D: was a good idea to host xblite, but I do use my mistakes to learn a little bit more.