当我尝试打开扩展管理员我得到致命错误：类’Mage_Test_Helper_Data’找不到/var/www/html/dev/app/Mage.PHP在线520

但是我觉得我没有在扩展中使用helper类。你的建议是受欢迎的。

这是我的config.xml文件

<?xml version="1.0"?>
<config>
    <modules>
        <Package_Test>
            <version>1.0.0</version>
        </Package_Test>
    </modules>
    <frontend>
        <routers>
            <routerfrontend>
                <use>standard</use>
                <args>
                    <module>Package_Test</module>
                    <frontName>test</frontName>
                </args>
            </routerfrontend>
        </routers> 
        <layout>
            <updates>
                <test>
                    <file>test.xml</file>
                </test>
            </updates>
        </layout>    
    </frontend>
    <admin> 
        <routers>
            <test>  
                <use>admin</use>
                <args>
                    <module>Package_Test</module>
                    <frontName>admintest</frontName>
                </args>
            </test>
        </routers>
    </admin>
    <adminhtml>
        <layout>
            <updates>
                <test>
                    <file>test.xml</file>
                </test>
            </updates>
        </layout>
        <menu>
        <test translate="title" module="adminhtml">
            <title>My Module</title>
            <sort_order>100</sort_order>
            <children>
                <items module="Test">
                    <title>Address Book</title>
                    <action>admintest/adminhtml_index</action>
                </items>
            </children>
        </test>
        </menu>
    </adminhtml>
    <global>
         <helpers>
            <class>Package_Test_Helper</class>
         </helpers>
        <blocks>
            <test>
                <class>Package_Test_Block</class>
            </test>
        </blocks>
        <models>
            <test>
                <class>Package_Test_Model</class>
                <resourceModel>test_MysqL4</resourceModel>
            </test>
            <test_MysqL4>
                <class>Package_Test_Model_MysqL4</class>
                <entities>
                    <test>
                        <table>package_test</table>
                    </test>
                </entities>
            </test_MysqL4>
        </models>
        <resources>
            <test_write>
                <connection>
                    <use>core_write</use>
                </connection>
            </test_write>
            <test_read>
                <connection>
                    <use>core_read</use>
                </connection>
            </test_read>
        </resources>
    </global>
</config>