ClientNodeTypeManager cannot be cast to JackrabbitNodeTypeManager

[Thomas Lustig]

Hi all,

I am using Jackrabbit 2.1 connecting to server via RMI:
........ snippet ....
repository = new RMIRemoteRepository("//localhost/jackrabbit.repository");
........

I used this example directly from Jackrabbit site:
http://jackrabbit.apache.org/node-types.html#NodeTypes-RegisteringNodeTypes

........ snippet ....
JackrabbitNodeTypeManager manager = (JackrabbitNodeTypeManager)
               session.getWorkspace().getNodeTypeManager();
        // Register the custom node types defined in the CND file
        manager.registerNodeTypes(new FileInputStream(cndFileName),
               JackrabbitNodeTypeManager.TEXT_X_JCR_CND);
........

when i run this, i get the following Error:
java.lang.ClassCastException: 
org.apache.jackrabbit.rmi.client.ClientNodeTypeManager cannot be cast to 
org.apache.jackrabbit.api.JackrabbitNodeTypeManager

I read that it is important to use ServerAdapterFactory and 
ClientAdapterFactory classes, but i do not know how.
Can anyone tell me how to get the ebove code working?

Please help me, its very important for me to register new node types

best regards
thomas