Thank you for posting.
Can the FMServer_Sample file be modified? What are the file permissions on the .fp7 files in the FileMaker Server > Data > Databases folder? In Get Info they should contain the following (on OS X 10.6.4):
fmserver: Read & Write
fmsadmin: Read & Write
everyone: Read only
I would suspect that the issue is file permissions since the files were copied into the directory. Please check that they aren't still owned by the Admin account on the Mac.