ORBSingleton: access denied

["Cleiton Cabral" <ccabrals@xxxxxxxxxx>]

No meu JavaIIOPInvokerProxy, ao fazer a chamada CORBA para o lado servidor, 
estou tentando executar string_to_object como abaixo:

ORB orb = ORB.init();
org.omg.CORBA.Object obj = orb.string_to_object(this.iorReference);

E o seguinte erro ocorre ao executar "string_to_object":

java.lang.SecurityException: ORBSingleton: access denied
at com.sun.corba.se.impl.orb.ORBSingleton.string_to_object(Unknown Source)
at 
org.jboss.invocation.javaiiop.interfaces.JavaIIOPInvokerProxy.invoke(JavaIIOPInvokerProxy.java:71)
at 
org.jboss.invocation.javaiiop.interfaces.JavaIIOPInvokerProxy.invoke(JavaIIOPInvokerProxy.java:1)
at 
org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:331)
at 
org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:194)
at 
org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:61)After 
casting!
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:184)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100)
at $Proxy0.create(Unknown Source)
at ep2.client.TestClient.main(TestClient.java:33)

Alguma dica??

Cabral.