Admin Button with Ajax Request

Question

I follow this tutorial to use Ajax request in my button: http://www.atwix.com/magento/add-button-to-system-configuration/

But clicking on the button I get the error "Not Found 404" to url:

http://127.0.0.1:8080/316store/index.php/admin/adminhtml_mateusvitali_sigepweb_options/check/key/ab6b3729a1d318e6d7bd970c5b8d333e/?isAjax=true&&...

My button.phtml

location: /app/design/adminhtml/default/default/template/mateusvitali/system/config/button.phtml

<script type="text/javascript">
    //<![CDATA[
    function check() {
        new Ajax.Request('<?php echo $this->getAjaxCheckUrl() ?>', {
            method:     'get',
            onSuccess: function(transport) {
               alert('Sent notification.');
            },
            onFailure: function(transport) {
               alert("Couldn't send a notification.");
            }
        });
    }
    //]]>
</script>

<?php echo $this->getButtonHtml() ?>

My Button.php

location: /app/code/local/MateusVitali/SigepWeb/Block/Adminhtml/System/Config/Form/Button.php

class MateusVitali_SigepWeb_Block_Adminhtml_System_Config_Form_Button extends Mage_Adminhtml_Block_System_Config_Form_Field
{
    /*
     * Set template
     */ 
    protected function _construct()
    {
        parent::_construct();
        $this->setTemplate('mateusvitali/system/config/button.phtml');
    }

    /**
     * Return element html
     *
     * @param  Varien_Data_Form_Element_Abstract $element
     * @return string
     */
    protected function _getElementHtml(Varien_Data_Form_Element_Abstract $element)
    {
        return $this->_toHtml();
    }

    /**
     * Return ajax url for button
     *
     * @return string
     */
    public function getAjaxCheckUrl()
    {
        return Mage::helper('adminhtml')->getUrl('adminhtml/adminhtml_mateusvitali/check');
    }

    /**
     * Generate button html
     *
     * @return string
     */
    public function getButtonHtml()
    {
        $button = $this
            ->getLayout()
            ->createBlock('adminhtml/widget_button')
            ->setData(
                array(
                    'type'      => 'button',
                    'id'        => 'mateusvitali_update',
                    'label'     => $this->helper('adminhtml')->__('Check'),
                    'onclick'   => 'javascript:check(); return false;'
            )
        );

        return $button->toHtml();
    }
}

My MateusVitaliController.php

location: /app/code/local/MateusVitali/SigepWeb/controllers/Adminhtml/MateusVitaliController.php

class MateusVitali_SigepWeb_Adminhtml_MateusVitaliController extends Mage_Adminhtml_Controller_Action
{
    /**
     * Return some checking result
     *
     * @return void
     */
    public function checkAction()
    {
        $successCode = 1;
        Mage::app()->getResponse()->setBody($successCode);
    }
}

Answer 1

I think it is related to your config.xml. Try putting this on your config.xml:

<admin>
 <routers>
  <adminhtml>
   <args>
    <modules>
     <matheusvitali_sigepweb after="Mage_Adminhtml">MatheusVitali_SigepWeb_Adminhtml</matheusvitali_sigepweb>
    </modules>
  </args>
 </adminhtml>

and change your block method to this:

public function getAjaxCheckUrl(){
  return Mage::helper('adminhtml')->getUrl('adminhtml/mateusvitali/check');
}