Quicktime files can only be inserted into container fields with the "store by reference" option. That means that the actual sound file is not stored in the database, only the filepath that tells FileMaker where to find the file. When you move the file to the server, the sound file is left behind on your computer. You'll need to move the file to a shared directory where all your users can access it directly via a mapped/mounted drive. Then you can re-insert your sound file from this new location and it should be accessible to your users.