Php – Magento custom admin module 404 not found

I have tried to create a new module for the magento admin section. I have seen many topics on this problem but none of them solved my issue.

I have created a file in app/etc/modules/ named Company_CustomList.xml

<?xml version="1.0"?>
<config>
         <modules>
                <Company_CustomList>
                        <active>true</active>
                        <codePool>local</codePool>
                </Company_CustomList>
         </modules>
</config>

Then in app/code/local/Company/CustomList I have created the following files:

app/code/local/Company/CustomList/Block/List.php

<?php
class Company_CustomList_Block_List extends Mage_Core_Block_Template
{
  // necessary methods
}
?>

app/code/local/Company/controllers/Adminhtml/IndexController.php

<?php
class Company_CustomList_Adminhtml_IndexController extends Mage_Adminhtml_Controller_Action
{
    public function indexAction()
    {
        $this->loadLayout();
        $this->renderLayout();
    }


}
?>

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

<?xml version="1.0"?>
<config>
    <modules>
        <Company_CustomList>
            <version>0.1.0</version>
        </Company_CustomList>
    </modules>
    <adminhtml>
        <acl>
            <resources>
                <admin>
                    <children>
                        <customlist>
                            <title>Custom list</title>
                            <children>
                                <example translate="title" module="customlist">
                                    <title>Index</title>
                                </example>
                            </children>
                        </customlist>
                    </children>
                </admin>
            </resources>
        </acl>
    </adminhtml>
    <global>
        <helpers>
            <customlist>
                <class>Company_CustomList_Helper</class>
            </customlist>
        </helpers>
    </global>
</config>

app/code/local/Company/etc/adminhtml.xml

<?xml version="1.0"?>
<config>
    <menu>
        <customlist translate="title" module="customlist">
            <title>Custom list</title>
            <sort_order>15</sort_order>
            <children>
                <example translate="title" module="customlist">
                    <title>Index</title>
                    <sort_order>1</sort_order>
                    <action>adminhtml/customlist/index</action>
                </example>
            </children>
        </customlist>
    </menu>
    <acl>
        <resources>
            <admin>
                <children>
                    <customlist translate="title" module="customlist">
                        <title>Custom list</title>
                        <sort_order>15</sort_order>
                        <children>
                            <example translate="title" module="customlist">
                                <title>Index</title>
                                <sort_order>1</sort_order>
                                <action>adminhtml/customlist/index</action>
                            </example>
                        </children>
                    </customlist>
                </children>
            </admin>
        </resources>
    </acl>
</config>

app/code/local/Company/Helper/Data.php

<?php
class Company_CustomList_Helper_Data extends Mage_Core_Helper_Abstract {

}

?>

The problem might come from my ACL… but I really can't find how to fix it.

Thanks,