How to be redirected from login form to BasePage?

[CIJOML]

Hi,

I wrote little application which now I want secure.
So I developped login form, but I am unable to be redirected to BasePage after 
successfull login.

When I call such page directly in DP.application, it renders:

<!DOCTYPE application PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  "http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd";>
<!-- generated by Spindle, http://spindle.sourceforge.net -->

<application name="DP" engine-class="org.apache.tapestry.engine.BaseEngine">
    <description>DP Michal Semler</description>    
    <page name="Home" specification-path="Home.page"/> <!-- uvodni stranka -->
    <library id="contrib" 
specification-path="/org/apache/tapestry/contrib/Contrib.library"/>
    <library id="menu" 
specification-path="/org/krysalis/menu/component/Menu.library"/>
</application>

But when I change Home.page to Login.page, it returns errors:

Login process goes OK, and then I don't know how to call from cycle.activate 
my Home.page:

My Login.java
-------------
package org.cijoml.ui.pages;

import java.sql.SQLException;


import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.IPage;
import org.apache.tapestry.html.BasePage;
import org.cijoml.utils.IBatisUtil;
import org.cijoml.model.Administrator;

import com.ibatis.sqlmap.client.SqlMapClient;


public abstract class Login extends BasePage {

        public abstract String getNick();
        public abstract String getHeslo();
        public abstract void setZprava(String zprava);
        
        public void login(IRequestCycle cycle) throws SQLException 
        {
                if (isValidLogin(getNick(), getHeslo())) {
                        cycle.activate("Home.page");
        
                        return;
                }
                setZprava("Spatne jmeno nebo heslo!!!");
        }
        
        private boolean isValidLogin(String nick, String heslo) throws 
SQLException {
                return true; //this is not important for this case
        }
}
------------

Login.html:

<html jwcid="@Shell" title="Prihlaseni">
<body>
    <span jwcid="@Conditional" condition="ognl:zprava">
        <font color=red>
        <span jwcid="@Insert" value="ognl:zprava">
            Error Message
        </span>
        </font>
    </span>
    
    <p>
    
    <form jwcid="@Form" listener="ognl:listeners.login">
        
        <table>
        <tr>
            <th>Jmeno Administratora: </th>
            <td>
                <input type="text" jwcid="@TextField" value="ognl:nick" 
size="30"/>
            </td>
        </tr>
        
        <tr>
            <th>Heslo: </th>
            <td>
                <input type="password" jwcid="@TextField" value="ognl:heslo" 
hidden="ognl:true" size="30"/>
            </td>
        </tr>
        
        <tr>
            <td><input type="submit" value="Login"/></td>
        </tr>
        </table> 
    </form>
</body>
</html>

Login.page:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE page-specification PUBLIC
  "-//Apache Software Foundation//Tapestry Specification 3.0//EN"
  "http://jakarta.apache.org/tapestry/dtd/Tapestry_3_0.dtd";>
<!-- generated by Spindle, http://spindle.sourceforge.net -->

<page-specification class="org.cijoml.ui.pages.Login">

    <property-specification name="zprava" type="java.lang.String"/>
    <property-specification name="nick" type="java.lang.String"/>    
    <property-specification name="heslo" type="java.lang.String"/>
        
</page-specification>

Thanks a lot for help!

Michal

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