Thank you for your post.
FileMaker Pro 9.0v3 will not display available files on the network unless Rosetta is installed. However, you must first uninstall FileMaker Pro 9.0v3, install Rosetta from the Optional Installs folder on the Snow Leopard DVD, and then reinstall FileMaker Pro 9.0v3. You are then able to view and access remote database files.
Please also see Knowledge Base Article #7337: