My first RMI server: problem

Hi,
I'm just trying to create my first RMI program, but I got already blocked immediately:
It's just a stupid program with a function that returns "ok".
So what I did is the following:
1)I created a class OkServer.java
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface OkServer extends Remote {
public String getOk() throws RemoteException;
2)I created a class OkServerImpl.java
import java.rmi.server.UnicastRemoteObject;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;
import java.rmi.Naming;
public class OkServerImpl extends UnicastRemoteObject implements OkServer {
public OkServerImpl() throws RemoteException {
public String getOk() {
     return "ok";
public static void main (String args[]) throws Exception {
          System.setSecurityManager(new RMISecurityManager());
          OkServerImpl OkSvr = new OkServerImpl();
          Naming.bind("OkServer", OkSvr);
3) I compiled everything with javac *.java
i use java version below:
java version "1.5.0_12"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_12-b04)
Java HotSpot(TM) Client VM (build 1.5.0_12-b04, mixed mode)
4)I opened a cmd window and started the registry with the command c:\rmiregistr
(a cursor starts blinking, so I think it runs correctly)
5)then I start the program with the command: C:\java OkServerImpl
but I get the error below !!
C:\Temp\rmitester>java OkServerImpl
Exception in thread "main" java.security.AccessControlException: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034)
at java.net.Socket.connect(Socket.java:513)
at java.net.Socket.connect(Socket.java:469)
at java.net.Socket.<init>(Socket.java:366)
at java.net.Socket.<init>(Socket.java:179)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:569)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:306)
at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
at java.rmi.Naming.bind(Naming.java:111)
at OkServerImpl.main(OkServerImpl.java:18)
What's wrong???

solved, but i don't understand why i encountered this particular issue (that isn't mentioned to happen or to configure in my book):
i had to create a custom policy file:
make a file "c:\temp\rmitester\policy.all" and past the text below in it:
grant {
permission java.security.AllPermission "", "";
thereafter launch the server with this command:
c:\temp\rmitester\java -Djava.security.policy=policy.all OkServerImpl
and the client with this command:
c:\temp\rmitester\java -Djava.security.policy=policy.all OkClient localhost
Can anyone explain if it was normal that i encountered this problem or was it seldom behaviour that happens only to me?

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    Hello friend,
    I have the same problem have posted above, and I have try all them have showed but no way! so try my self.
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    /* AUTOMATICALLY GENERATED ON Tue Jan 13 12:55:40 GMT+07:00 2004*/
    /* DO NOT EDIT */
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    permission java.net.SocketPermission "localhost:1024-", "listen";
    permission java.util.PropertyPermission "java.version", "read";
    permission java.util.PropertyPermission "java.vendor", "read";
    permission java.util.PropertyPermission "java.vendor.url", "read";
    permission java.util.PropertyPermission "java.class.version", "read";
    permission java.util.PropertyPermission "os.name", "read";
    permission java.util.PropertyPermission "os.version", "read";
    permission java.util.PropertyPermission "os.arch", "read";
    permission java.util.PropertyPermission "file.separator", "read";
    permission java.util.PropertyPermission "path.separator", "read";
    permission java.util.PropertyPermission "line.separator", "read";
    permission java.util.PropertyPermission "java.specification.version", "read";
    permission java.util.PropertyPermission "java.specification.vendor", "read";
    permission java.util.PropertyPermission "java.specification.name", "read";
    permission java.util.PropertyPermission "java.vm.specification.version", "read";
    permission java.util.PropertyPermission "java.vm.specification.vendor", "read";
    permission java.util.PropertyPermission "java.vm.specification.name", "read";
    permission java.util.PropertyPermission "java.vm.version", "read";
    permission java.util.PropertyPermission "java.vm.vendor", "read";
    permission java.util.PropertyPermission "java.vm.name", "read";
    permission java.net.SocketPermission "*:1024-65535", "connect,accept";
    permission java.net.SocketPermission "*:80", "connect";
    grant {
    permission java.security.AllPermission;
    =======================end of code==============
    then there is the guide for building this example
    I save my example in:
    ReverseInterface.java file and Reverse.java
    c:\rmiexample
    client.java in c:\rmiexample\test and the policy in c:\rmiexample\policy
    1/Compile all class
    javac *.java
    2/ generate Stub and skeleton
    rmi Reverse
    3/ start RMI registry
    start rmiregistry
    4/execute remode object
    java -classpath c:\rmiexample\ -Djava.rmi.server.codebase=file:/C:\rmiExample\ -Djava.rmi.server.hostname=localhost -Djava.security.manager -Djava.security.policy=file:/C:\rmiExample\policy\.java.policy Reverse
    Reverse object bound
    5/ Run client
    java -classpath c:\rmiexample\test\ Client 123456789
    The reverse of 123456789 is 987654321
    If you system is config well you run it without any problem but, my computer have many problem with JVM, so I have to work very hard to pass this example ;-)
    The first problem is that:
    C:\rmiExample>java -classpath c:\rmiexample\test\ Client qerrewrw
    Error accessing remote object.
    java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
    java.lang.ClassNotFoundException: Reverse_Stub (no security manager: RMI class loader disabled)
    the second error when i change, policy folowing the guide in the book,
    C:\rmiExample>java -classpath c:\rmiexample\test\ Client qerrewrw
    Error accessing remote object.
    java.rmi.UnmarshalException: error unmarshalling return; nested exception
    java.lang.ClassNotFoundException: access to class loader denied
    as you see, I went to java.sun.com, I hope in there will help me pass my problem, but there are many guide, but you know , no thing fix with me... any way thank you very much, about the time you spend on writing the guide
    and there is the last I do myself, chand policy to
    grant {
    permission java.security.AllPermission;
    C:\rmiExample>java -classpath c:\rmiexample\test\ Client 123456789
    The reverse of 123456789 is 987654321
    of course , this is not the good solution, but I just want to show that to make it runfirst and will fine tune later.
    I hope you run all easily...
    vnnWeb.

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