Form Direct to Private Page with Auto Login

I've read all the posts regarding this topic and I've not found a solution or at least a solution that was easy for me to implement.

I have a form that once submitted will redirect to a private page with links on that page to download a free item.

I want the user to fill in the form, be redirected to the second page and automatically logged in with a specific username and password, so they can see the private page.

I've tried the following code in my theme functions.php file.

add_action( 'gform_user_registered', 'pi_gravity_registration_autologin', 10, 4 );
/**
 * Auto login after registration.
 */
function pi_gravity_registration_autologin( $user_id, $user_config, $entry, $password ) {
	$user = get_userdata( $user_id );
	$user_login = $user->user_login;
	$user_password = $password;

    wp_signon( array(
		'user_login' => 'freeitem',
		'user_password' =>  'samplepassword',
		'remember' => false
    ) );
}

But, I don't really understand how I customize the above code to get it right and even more specific, just for the one form, not all forms.

Any ideas would be greatly appreciated! Love Gravity Forms!!

Louise

Chris,

I tried what you suggested:

function pi_gravity_registration_autologin( $user_id, $user_config, $entry, $password ) {
	if(5 == $entry['form_id']) {
	$user = get_userdata( $user_id );
	$user_login = $user->user_login;
	$user_password = $password;

	$user = wp_signon( array(
		'user_login' => 'freeitem',
		'user_password' =>  'samplepassword',
		'remember' => false
    ) );
// see what $user contains, as a debugging step
var_dump($user);
// or, check for an error
if ( is_wp_error($user) )
   echo $user->get_error_message();

    }
}

All that was returned, was the 404 error page not found. When I'm already logged in, I am directed to the private page.

I added the debug code, but I'm not really sure where I should be seeing this.

I appreciate any help.

Louise

Chris, I get a 404 page when I'm not logged in already and submit the form.
I did not see any debugging code anywhere. Is this something if I send you the URL, you would look at?

Louise