Problem binding Base abstract class

I have multiple hierarchical class like below

public abstract class Page extends SelPage
{
public method 1{}
public method 2{}
public method 3{}
}

Class DashboardPage extens Class Page{
{ }

Here I need to bind new Page class
Class ProjPage extends Page{
public method1{} /* change method implementation */
public method 2{} /* change method implementation */
public method 3{} /* change method implementation */
}

public class ProjSeleniumSuite extends SeleniumSuite {

private static Injector injector;

@BeforeClass
public static void setUp() throws Exception {
injector = Guice.createInjector(new AbstractModule() {
@Override
protected void configure() {
System.out.println("configuriung");
bind(Page.class).to(ProjPage.class);
}
});
}
@AfterClass
public static void tearDown() throws Exception {
injector = null;
}
}

The above code runs fine..but it is not binding the Page class method implementation with ProjPage class methods
Can i achieve this using Guice binder like above?

The thing i need to achieve is, when i instantiate DashboardPage , i want ProjPage methods to be called instead of Page class methods.

Please help