Please help to resolve this: I created a new Tab for my module in the admin panel (next to System). But it redirects to a front page instead of backend page. I need it to display a backend page where I will create a grid filter,etc.

Here is the config file code:

     <config>
<modules>
    <Cpstest_ProductComments>
        <version>0.1.0</version>
    </Cpstest_ProductComments>
</modules>
<frontend>    
    <layout>
        <updates>
            <productcomments module="Cpstest_ProductComments">
                <file>productcomments.xml</file>
            </productcomments>
        </updates>
    </layout>
    <routers>
        <productcomments>
            <use>standard</use>
            <args>
                <module>Cpstest_ProductComments</module>
                <frontName>productcomments</frontName>
            </args>
        </productcomments>          
        <adminhtml>
            <args>
                <modules>
                    <module_name before="Mage_Adminhtml">Cpstest_ProductComments_Adminhtml</module_name>
                </modules>
            </args>
        </adminhtml>            
    </routers>
</frontend>   
<global>
<models>
        <productcomments>
            <class>Cpstest_ProductComments_Model</class>
        </productcomments>
    </models>       
     <resources>
     <productcomments_setup>
            <setup>
                <module>Cpstest_ProductComments</module>
                <class>Mage_Eav_Model_Entity_Setup</class>
               <class>Cpstest_ProductComments_Model_Resource_Mysql4_Setup</class>
                <class>Mage_Catalog_Model_Resource_Setup</class>
            </setup>
            <connection>
                <use>core_setup</use>
            </connection>
        </productcomments_setup>   
        <productcomments_write>
            <connection>
                <use>core_write</use>
            </connection>
        </productcomments_write>
        <productcomments_read>
            <connection>
                <use>core_read</use>
            </connection>
        </productcomments_read>
    </resources>
    <helpers>
        <productcomments>
            <class>Cpstest_ProductComments_Helper</class>                                                             
        </productcomments>            
    </helpers>
    </global>                                   
    <adminhtml>
    <menu>
    <backend_menu translate="title" module="productcomments">
            <title>CPS Product Comments</title>
            <sort_order>9999</sort_order>
            <children>
                <first_page module="productcomments">
                    <title>Product Comments</title>
                    <action>productcomments/index/index</action>
                </first_page>
            </children>
    </backend_menu> 
    </menu>
    </adminhtml>
    </config>

And here is my controller file function:

        public function indexAction()
    {
        $this->loadLayout();

        //create a text block with the name of "example-block"
         $block = $this->getLayout()
         ->createBlock('core/text', 'example-block')
         ->setText('<h1>This is a text block</h1>');

        //$this->_addContent($block);
        $this->getLayout()->getBlock('content')->append($block);            
        
        
        
        $this->renderLayout();
    }   

I'm using this article and it's taking to a backend page in his example: http://alanstorm.com/magento_admin_controllers/

I took steps according to this article but the newly created link displays the "text block" on the front-end instead of back-end. http://alanstorm.com/magento_admin_controllers/

Can anyone help me understand what's the problem? Greatly appreciate your help guys!