JESS: Problem in Modfying a java Object

Hello All,

I have an object called Request in java. I am trying to modify the object by
firing a jess rule but i don't find any changes in the object

Request class:

package proto;

import java.io.*;

public class Request implements Serializable
{
	public String destination;
	public int passengerAge;
	
	public void setDestination(String dest)
	{
		destination 	}
	
	public void setPassengerAge(int personAge)
	{
		passengerAge 	}
	
	public String getDestination()
	{
		return destination;
	}
	
	public int getPassengerAge()
	{
		return passengerAge;
	}
}

Java code for accessing the jess rules :

			final Rete engine 			
                        engine.eval("(deftemplate Request (declare
(from-class proto.Request)))");
			
                        engine.eval("(deftemplate Proposal (declare
(from-class proto.Proposal)))");
			
                        FileReader fp FileReader("C:\\Users\\Venkat\\workspace\\nnayuni_contract-net_p5\\src\\SellerRules.clp");
 
			final Context context 
			final Jesp parser 
                                        Object result 					while(!result.equals(Funcall.EOF))
					{
						try 
						{
							result 							System.out.println(result);
						} 
						catch (JessException e) 
						{
							e.printStackTrace();
						}
					}
					try 
					{
						Request req 						Proposal temp 						Fact f 						f.setSlotValue("passengerAge", new Value(req.getPassengerAge()));
						f.setSlotValue("destination", new Value(req.getDestination()));
						engine.assertFact(f);
						engine.reset();
						engine.run();
						System.out.println(req.getPassengerAge());
					} 
                    catch (JessException e) 
                    {
						e.printStackTrace();
					}
                    catch (UnreadableException e) 
                    {
						e.printStackTrace();
					}

jess rule :

(defrule welcome-toddlers
    "Give a special greeting to young children"
    ?fact <- (Request {passengerAge > 3})
        
(modify ?fact (passengerAge 14))) 
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