i1Share 1.4, especially the included EyeOne.dll, is not updated for Vista. This is why the Eye-One device will not be recognized. To work around this issue, close i1Share, disconnect your Eye-One, then download and install latest Eye-One Match or i1Diagnostic Software (see links below). Now navigate to the Eye-One Match or i1Diagnostic program folder, copy the EyeOne.dll and replace it in the i1Share program folder. Launch i1Share software. The Eye-One should now be recognized.
Download latest Eye-One Match Software here