I am trying to extend **`Mage_Core_Model_Email_Template_Filter`** class to add translate directive but I can't make it work.

Here my module:

> 
> app/code/local/Company/Module/etc/config.xml
> 
> 
> 

```
<config>
    <modules>
        <Company_Module>
            <version>1.0.0</version>
        </Company_Module>
    </modules>
    <global>
        <models>
            <core>
                <rewrite>
                    <email_template_filter>Company_Module_Model_Email_Template_Filter</email_template_filter>
                </rewrite>
            </core>
        </models>
    </global>
</config>

```

app/code/local/Company/Module/Email/Template/Filter.php

```
<?php

class Company_Module_Model_Email_Template_Filter extends Mage_Core_Model_Email_Template_Filter
{
    public function translateDirective($construction)
    {
        $params = $this->_getIncludeParameters($construction[2]);
        $text = $params['text'];
            return Mage::helper('page')->__($text);
    } 

}

```

I can't figure it out why doesn't it work.  

Any help?