Well, it doesn't work for me. It won't show the FLV file on the open-file dialog box, and it gives me an error if I right-click the FLV and do an "Open with . . ." Zoom Player. Looking at their FAQ page, it seems that this player relies a lot on external components (filters, codecs). My guess is that you have some sort of Macromedia filter installed, maybe as part of some program you had installed earlier.