Integration

Hello again :)
A have still stuck on TopLink :(
I created very simple example:

DB:
create table TESTIK
(
ID NUMBER not null,
NAZEV VARCHAR2(255),
VERSION NUMBER
)

I created new project in TopLink WorkBench, created new session.. I mean, there is no problem (but I'm not sure :) ) .
I created new Dynamic WebApplication in Eclipse, using Glassfish server and framework JSF...
My source:

This is my entity, represent table TESTIK
Testik.class:
package toplink.model.entity;
import java.io.Serializable;
public class Testik implements Serializable { // implements Serializable
private int id;
private String nazev;
private int version;

public Testik() {
}

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getNazev() {
return nazev;
}
public void setNazev(String nazev) {
this.nazev = nazev;
}

public int getVersion() {
return version;
}

public void setVersion(int version) {
this.version = version;
}
}

This is for create session - i don't now, is it rights? :)
SessionSetting.class:
package toplink.services.settings;

import oracle.toplink.sessions.Project;
import oracle.toplink.threetier.Server;
import oracle.toplink.tools.workbench.XMLProjectReader;

public class SessionSetting extends oracle.toplink.platform.xml. jaxp.JAXPPlatform {
public SessionSetting() {
}
public Server getSession(){
System.setProperty("toplink.xml.platform", "oracle.toplink.platform.xml.jaxp.JAXPPlatform");
Project myProject = XMLProjectReader.read("c:/ecl_work/TopLink_Intro/src/META-INF/TopLink_Intro.xml", Thread.currentThread().getContextClassLoader());
Server serverSession = myProject.createServerSession();
return serverSession;
}
}

And if I want used some query:

public Testik findById(int id) {
SessionSetting ss = new SessionSetting();
Server session = ss.getSession();
Testik testik = (Testik) session.readObject(Testik.class, new ExpressionBuilder().get("id").equal(1));
return testik;
}

But this return Exception:
javax.servlet.ServletException: #{testikManagedBean.najdiTestik}: Exception [TOPLINK-6015] (Oracle TopLink - 11g (11.1.1.0.0) (Build 080909)): oracle.toplink.exceptions.QueryException
Exception Description: Invalid query key [id] in expression.
Query: ReadObjectQuery(toplink.model.entity.Testik)

Where testikManagedBean.najdiTestik call findById(int id) !

I tried used StoredProcedureCall, ReadObjectQuery, ValueReadQuery, ReadAllQuery and nothing works :(

Example:
public Collection<Testik> findAll(){
SessionSetting ss = new SessionSetting();
Server session = ss.getSession();
Collection<Testik> testiky = session.readAllObjects(Testik.class);
return testiky;
}

but in this example, it works a long time and return:
javax.servlet.ServletException: #{testikManagedBean.vsechnyTestiky}: Exception [TOPLINK-4002] (Oracle TopLink - 11g (11.1.1.0.0) (Build 080909)): oracle.toplink.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Exception input/output: The Network Adapter could not establish the connection
Error Code: 17002
Query: ReadAllQuery(toplink.model.entity.Testik)

I know what it means in this problem, but I do not know where is it, because in the workbench I can normally connect to the database... Is this problem in sessions or where?

Please, I tried some very simple example, how to use TopLink and Queries and i'm still stuck.. I'm newbie in toplink and I do not know your advice...
Please, could you help me with my problem?

Thanks in advance