[NeedHELP]Custom Subscription Payment Method

[ReddeR1337]

I wanna add custom Sub method

PHP Code:

<?php

class vB_PaidSubscriptionMethod_custom extends vB_PaidSubscriptionMethod
{
    function generate_form_html($hash, $cost, $currency, $subinfo, $userinfo, $timeinfo)
    {
        $form['action'] = 'customURL';
        $form['method'] = 'get';

        return $form;
    }
}

?>

But with this code i have error
Fatal error: Class 'vB_PaidSubscriptionMethod' not found in /home/*/*/www/includes/paymentapi/class_custom.php on line 4


I need redirect to custom page after pressing Order Using



How i can do that ?