For example: myserver.test.network.com
If you do not you may receive an error that says "The version of the server you are trying to connect to is not supproted. Please contact your system administrator to resolve the problem."
Also check what authentication method you are using.
- Open Server Manager
- Highlight "AFP"
- Click on the "Access" tab
- Change "Authentication" to "Any Method"
Note: changing the authentication to Any Method can possibly break single-sign-on for Snow Leopard client. If this happens change the authentication to "Kerberos". Lion clients should still be able to access the server.