Проблема, возникающая при создании формы в панели администратора для пользовательского модуля в Magento CE 1.9.2

Я разрабатываю свой пользовательский модуль, в котором я сталкиваюсь с проблемой. На самом деле я сделал пользовательскую кнопку на сетке. Это указывает на форму, в которой сохраняются некоторые данные. Но из-за какой-то проблемы это не приходит.

Это идет вот так

Вот как я добавил кнопку на сетке.

public function getMainButtonsHtml()
{
$html=  parent::getMainButtonsHtml();
$add_button_work = $this->getLayout()->createBlock('adminhtml/widget_button')
->setData(array(
"label"=> Mage::helper('custom_abc')->__('Custom'),
"onclick"=> "setLocation('".$this->getUrl('*/*/newCustom')."')",
"class"=>"save"));
$html .= $add_button_work->toHtml();
return $html;
}

Вот мой код контроллера

public function newCustomAction()
{

$this->_title($this->__("Custom"));
$this->_title($this->__("Custom"));
$this->_title($this->__("New Item"));

$id   = $this->getRequest()->getParam("id");
$model  = Mage::getModel("custom_abcd/abc_model")->load($id);

$data = Mage::getSingleton("adminhtml/session")->getFormData(true);
if (!empty($data)) {
$model->setData($data);
}

Mage::register("current_custom", $model);

$this->loadLayout();

$this->getLayout()->getBlock("head")->setCanLoadExtJs(true);

$this->_addBreadcrumb(Mage::helper("adminhtml")->__("custom manager"), Mage::helper("adminhtml")->__("custom manager"));
$this->_addBreadcrumb(Mage::helper("adminhtml")->__("custom manager"), Mage::helper("adminhtml")->__("custom manager"));$this->_addContent($this->getLayout()->createBlock("custom_abc/adminhtml_abcd_edit_tab_customize_customform"))->_addLeft($this->getLayout()->createBlock("custom_abc/adminhtml_abcd_edit_tab_customize_edit_tab_tabs"));

$this->renderLayout();
}

Мой код контейнера формы

class Custom_Abc_Block_Adminhtml_Abcd_Edit_Tab_Customize_Customform extends Mage_Adminhtml_Block_Widget_Form_Container {

public function __construct() {

parent::__construct();
$this->_objectId = "custom_id";
$this->_blockGroup = "custom_abc";
$this->_controller = "adminhtml_abc_custom";

$this->_updateButton("save", "label", Mage::helper("custom
_abc")->__("Save Item"));

$this->_updateButton("delete", "label", Mage::helper("custom_abc")->__("Delete Item"));$this->_addButton("saveandcontinue", array(
"label" => Mage::helper("custom_abc")->__("Save And Continue Edit"),
"onclick" => "saveAndContinueEdit()",
"class" => "save",
), -100);$this->_formScripts[] = "function saveAndContinueEdit(){ editForm.submit($('edit_form').action+'back/edit/'); } ";
}

public function getHeaderText() {
if (Mage::registry("current_custom") && Mage::registry("current_custom")->getId()) {

return Mage::helper("custom_abc")->__("Edit Item '%s'", $this->htmlEscape(Mage::registry("current_custom")->getId()));
} else {

return Mage::helper("custom_abc")->__("Add Settings");
}
}

}

Моя основная форма здесь
Класс Custom_Abc_Adminhtml_Abcd_Edit_Tab_Customize_Edit_Tab_customform extends Mage_Adminhtml_Block_Widget_Form {

protected function _prepareForm() {

$form = new Varien_Data_Form();
$this->setForm($form);
$fieldset = $form->addFieldset("custom_form", array("legend" => Mage::helper("custom_abc")->__("Custom")));

$fieldset->addField("custom_field1", "varchar", array(
"label" => Mage::helper('custom_abc')->__("Custom Field 1"),
"name" => "custom_field1",
));

$fieldset->addField("custom_field2", "varchar", array(
"label" => Mage::helper('custom_abc')->__("Custom Field 2"),
"name" => "custom_field2",
));if (Mage::getSingleton("adminhtml/session")->getCustomData()) {
$form->setValues(Mage::getSingleton("adminhtml/session")->getCustomData());
Mage::getSingleton("adminhtml/session")->setCustomData(null);
} elseif (Mage::registry("current_custom")) {
$form->setValues(Mage::registry("current_custom")->getData());
}
return parent::_prepareForm();
}

}