Cannot pass parameter in JSF

I am writing a JSF page to get user input, and pass that input to Crystal Report (Crystal Report for Eclipse 2.0). I don't know why the parameterFields cannot load my parameter. Please help me!!!

My First page (rptDemo.xhtml):

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"  
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<html xmlns="http://www.w3.org/1999/xhtml"  
    xmlns:h="http://java.sun.com/jsf/html"  
    xmlns:f="http://java.sun.com/jsf/core">  
<h:head>  
    <title>Crystal Report Demo</title>  
</h:head>  
<h:body>  
<h1>Crystal Report for Eclipse 2.0 Demo</h1>  
<h2>Using JSF 2.0 and JSF 1.2 to generate report</h2>  
<h3>This input/select page use JSF 2.0, result page use JSF 1.2 </h3>  
    <f:view>  
        <h:form>  
            <table border="1">  
                <tr>  
                    <td>No parameter passing to report</td>  
                    <td colspan="2"><h:commandButton value="Show report 1" action="#{reportBean.show1}"/> can show report normally</td>  
                </tr>  
                <tr>  
                    <td>Passing parameter to report<br/>(cannot pass parameter)</td>  
                    <td><h:inputText value="#{reportBean.inputText}"/></td>  
                    <td><h:commandButton value="Show report 2" action="#{reportBean.show2}"/></td>  
                </tr>  
            </table>  
        </h:form>  
    </f:view>  
</h:body>  
</html>

My second page (result page) for "Show Report 1 (rpt1.jsp)", this can run successfully:

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>  
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>  
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>  
<%@ taglib uri="http://www.businessobjects.com/jsf/crystalreportsviewers" prefix="bocrv" %>  
        
<head><title>View Report 1</title>  
</head>  
<body>  
<f:view>  
<h:form>  
<bocrv:reportPageViewer reportSource="#{reportBean.reportSource1}"  />   
</h:form>  
</f:view>  
<body>  
</html>

My third page (result page) for "Show Report 2 (rpt2.jsp)", this has error, parameterFields seem cannot load parameter:

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>  
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>  
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>  
<%@ taglib uri="http://www.businessobjects.com/jsf/crystalreportsviewers" prefix="bocrv" %>  
        
<head><title>View Report 2</title>  
</head>  
<body>  
<f:view>  
<h:form>  
<bocrv:reportPageViewer reportSource="#{reportBean.reportSource2}" allowParameterPrompting="false"  parameterFields="#{reportBean.parameterFields}" />   
</h:form>  
</f:view>  
<body>  
</html>

My report bean is:

package crDemo;  
  
import javax.faces.bean.ManagedBean;  
  
import com.crystaldecisions.reports.reportengineinterface.JPEReportSourceFactory;  
import com.crystaldecisions.sdk.occa.report.data.Fields;  
import com.crystaldecisions.sdk.occa.report.data.ParameterField;  
import com.crystaldecisions.sdk.occa.report.data.ParameterFieldDiscreteValue;  
import com.crystaldecisions.sdk.occa.report.data.Values;  
import com.crystaldecisions.sdk.occa.report.lib.ReportSDKException;  
import com.crystaldecisions.sdk.occa.report.reportsource.IReportSourceFactory2;  
  
@ManagedBean  
public class ReportBean {  
    private Object reportSource1 = null;  
    private Object reportSource2 = null;  
    private String inputText = "";  
    private Fields<ParameterField> parameterFields = new Fields<ParameterField>();  
      
    public Object getReportSource1() {  
        return reportSource1;  
    }  
    public void setReportSource1(Object reportSource1) {  
        this.reportSource1 = reportSource1;  
    }  
    public Object getReportSource2() {  
        return reportSource2;  
    }  
    public void setReportSource2(Object reportSource2) {  
        this.reportSource2 = reportSource2;  
    }  
    public String getInputText() {  
        return inputText;  
    }  
    public void setInputText(String inputText) {  
        this.inputText = inputText;  
    }  
    public Fields<ParameterField> getParameterFields() {  
        return parameterFields;  
    }  
    public void setParameterFields(Fields<ParameterField> parameterFields) {  
        this.parameterFields = parameterFields;  
    }  
      
    public String show1() {  
        try {  
        // Instantiate the report object  
        String reportLocation;  
        reportLocation = "rpt/demo1.rpt";  
        IReportSourceFactory2 rptSrcFactory = new JPEReportSourceFactory();  
          
            reportSource1 = rptSrcFactory.createReportSource(reportLocation, java.util.Locale.getDefault() );  
        } catch (ReportSDKException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
        return "rpt1";  
    }  
      
    public String show2() {  
        try {  
        // Instantiate the report object  
        String reportLocation;  
        reportLocation = "rpt/demo2.rpt";  
        IReportSourceFactory2 rptSrcFactory = new JPEReportSourceFactory();  
        reportSource2 = rptSrcFactory.createReportSource(reportLocation, java.util.Locale.getDefault() );  
          
        // Clear previous parameter  
        parameterFields.clear();  
  
        //Create a ParameterField object for each field that you wish to set.  
        ParameterField paramFieldOne = new ParameterField();  
  
        //You must set the report name. Set the report name to an empty string if your report does not contain a subreport; otherwise, the report name will be the name of the subreport  
        paramFieldOne.setReportName("");  
  
        //Create a Values object and a ParameterFieldDiscreteValue object for each parameter field you wish to set.  
        //If a ranged value is being set, a ParameterFieldRangeValue object should be used instead of the discrete value object.  
        Values valueOne = new Values();  
        ParameterFieldDiscreteValue paramFieldDVOne = new ParameterFieldDiscreteValue();  
  
        //----------- Initialize the parameter fields ----------  
  
        //Set the name and value for each parameter field that is added.  
        //Values for parameter fields are represented by a ParameterFieldDiscreteValue or ParameterFieldRangeValue object.  
        System.out.println("Input parameter = " + inputText);  
        paramFieldOne.setName("paramOne");  // "paramOne" is parameter name in my Crystal Report file (demo2.rpt)  
        paramFieldDVOne.setValue(inputText);  
  
        //Add the parameter field values to the Values collection object.  
        valueOne.add(paramFieldDVOne);  
  
        //Set the current Values collection for each parameter field.  
        paramFieldOne.setCurrentValues(valueOne);  
  
        //Add each parameter field to the Fields collection.  
        //The Fields object is now ready to be used with the viewer.  
        parameterFields.add(paramFieldOne);  
  
        } catch (ReportSDKException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
        return "rpt2";  
    }  
}