java.rmi.UnmarshalException: error unmarshalling

[Happy S Singh]

I get this execption when I try to access the RMI serevr from action class of struts(i.e. RMI client)

java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
	java.lang.ClassNotFoundException: com.mindcraft.queryExecutor.actionclass.ExecutorInterface (no security manager: RMI class loader disabled)

Below is my RMI client snippet

try{
		ExecutorInterface p=(ExecutorInterface)Naming.lookup("//localhost:2007/exec1");
		System.out.println("Inside client.."+ p.toString());
		int a= p.getJobStatus("2");
		System.out.println("a..." + a);
		p.killJob("1");
			p.executeJob(id, usrname, pswd);
		System.out.println("Threads started, main ends\n");
		}
		catch(Exception e)
		{
			System.out.println("Execption in RMI..."+ e);
			e.printStackTrace();
		}

It was fine when I try above code in separate file with public static void main(),but gets above exception when tried the same code in Action class of struts framework.