经过大量的研究，我终于找出了问题。我的问题是在 config.xml 中的 before =Mage_Adminhtml。由于企业工作的方式，不足以覆盖***类。

So after a lot of research I finally figured out the issue. My issue was with the before="Mage_Adminhtml" in config.xml. Due to the way enterprise works it was not enough to override the top level class.

我使用 print_r（Mage :: getConfig（） - > getNode（'admin / routers / adminhtml'），true）找出覆盖它的所有模块，并通过列表。 Mage_XmlConnect_Adminhtml 是在企业方法之前覆盖此方法的最后一个类。

I used print_r(Mage::getConfig()->getNode('admin/routers/adminhtml'), true) to figure out all the modules overriding it and worked through the list. Mage_XmlConnect_Adminhtml was the last class that overrode this method before enterprise methods.

我最后的config.xml是这样的：

My final config.xml was like this:

<config>
  <admin>
    <routers>
      <adminhtml>      
        <args>
          <modules>
            <Mymodule_Myextensionbefore="Mage_XmlConnect_Adminhtml">Mymodule_Myextension</Mymodule_Myextension>
          </modules>
        </args>      
      </adminhtml>
    </routers>
  </admin>
</config>

现在可以正常工作（编辑：Nope it does not ...见下面的评论）

It now works perfectly ( Nope it doesnt...see comment below)