[Aglets-developer] need urgent help

[jsp p. <pat...@ya...>]

Hello,
  i am using the platform java 1.4,aglet 2.0 version.getting error at security policy file

  The  code is as folows...
  
import java.awt.Frame;
import java.net.URL;
import java.net.UnknownHostException;
import java.io.File;
import java.util.Properties;
  import com.ibm.maf.*;
import com.ibm.aglet.*;
import com.ibm.aglet.system.*;
import com.ibm.aglets.MAFAgentSystem_AgletsImpl;
import com.ibm.aglets.tahiti.Tahiti;
import com.ibm.awb.security.AccessController;
import com.ibm.awb.misc.*;
  public class AirServer extends ContextAdapter {
    
    public void agletCreated(ContextEvent ev) {
 System.out.println("Aglet Created : " + ev.getAgletProxy());
    }
    
    public void agletCloned(ContextEvent ev) {
 // System.out.println("Aglet Cloned : " + ev.getAgletProxy());
    }
    
    public void agletArrived(ContextEvent ev) {
 // System.out.println("Aglet Arrived : " + ev.getAgletProxy());
    }
    
    public void agletActivated(ContextEvent ev) {
 // System.out.println("Aglet Activated : " + ev.getAgletProxy());
    }
      public void agletDisposed(ContextEvent ev) {
 System.out.println("Aglet Disposed : " + ev.getAgletProxy());
    }
    
    public void agletDispatched(ContextEvent ev) {
 System.out.println("Aglet Dispatched : " + ev.getAgletProxy());
    }
    
    public void agletDeactivated(ContextEvent ev) {
 // System.out.println("Aglet Deactivated : " + ev.getAgletProxy());
    }
    
    public void agletReverted(ContextEvent ev) {
 // System.out.println("Aglet Reverted : " + ev.getAgletProxy());
    }
    
    public void showMessage(ContextEvent ev) {
 // System.out.println("message : " + ev.getMessage());
    }
    
    private static final String PROTOCOL_FILE = "file";
    
    // additional options
    final static Opt options[] = {
 Opt.Entry("-protocol", "maf.protocol", null),
 Opt.Entry("-username", "username", null),
 Opt.Entry("-password", "password", null),
    };
    
    public static void main(String args[]) throws java.lang.Exception {
 Opt.setopt(options);
        AgletRuntime runtime = null;//AgletRuntime.init(args);
 
        String DEFAULT_USERNAME = "eseidler";
        String username = "eseidler";
        String password = "bla";
 try {
     AccessController.beginPrivileged();
     DEFAULT_USERNAME = System.getProperty("user.name");
            file://username = "eseidler"; file://System.getProperty("username", DEFAULT_USERNAME);
            file://password = "bla"; file://System.getProperty("password", "");
            username = "aglet_key";
            password = "aglets";
 } finally {
     AccessController.endPrivileged();
 }
 
        Object obj = runtime.authenticateOwner(username, password);
 if (obj == null) {
     System.err.println("Cannot authenticate the user \"" + username + "\"");
            throw new Exception("User authentication failed.");
 }
 
 
 MAFAgentSystem maf_system = new MAFAgentSystem_AgletsImpl(runtime);
 
 String protocol = "atp";
 try {
     AccessController.beginPrivileged();
     protocol = System.getProperty("maf.protocol", "atp");
 } finally {
     AccessController.endPrivileged();
 }
 
 MAFAgentSystem.initMAFAgentSystem(maf_system, protocol);
 file://Tahiti.initializeGUI();
 Tahiti.installFactories();
 
 //
 // Creates a named context. To dispatch to this context, you have to
 // specify the destination, for example,
 // "atp://aglets.trl.ibm.com:434/test"
        // Defining multiple context is also supported.
 //
 Tahiti.installSecurity();
 MAFAgentSystem.startMAFAgentSystem(maf_system, protocol);
   AgletContext cxt = runtime.createAgletContext("aircraft");
 cxt.addContextListener(new AirServer());
 
 cxt.start();
 // From here on, you can use this context.
 // (creating, dispatching an aglet, for instance)
   cxt.createAglet(null, "aircraft.AircraftAgent", null);
      }
}
  
i am getting the foloowing error...
java.lang.ClassCastException: sun.security.provider.PolicyFile
        at com.ibm.awb.security.Policy.getThisPolicy(Policy.java:82)
        at com.ibm.awb.security.Policy.getPolicy(Policy.java:59)
        at com.ibm.awb.security.ProtectionDomain.<clinit>(ProtectionDomain.java:62)
        at com.ibm.awb.security.AccessController$BootstrapIntrospector.getDomain
At(AccessController.java:64)
        at com.ibm.awb.security.AccessController.beginPrivileged(AccessControlle
r.java:134)
        at AirServer.main(AirServer.java:70)
Exception in thread "main" java.lang.NoClassDefFoundError
        at com.ibm.awb.security.ProtectionDomain.getDomain(ProtectionDomain.java
:238)
        at com.ibm.awb.security.AccessController$BootstrapIntrospector.getDomain
At(AccessController.java:64)
        at com.ibm.awb.security.AccessController.endPrivileged(AccessController.
java:147)
        at AirServer.main(AirServer.java:77)
  
 

 			
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