top menu not showing after upgrade

Question

I just upgrade from Mag CE 1.5 to 1.7.0.2 and heck, fall in to troubles in a row..fixed a few but stuck at top menu..

app/design/frontend/default/tenniskarma/template/page/html/topmenu.phtml contains

* @see Mage_Page_Block_Html_Topmenu
 */
?>
<?php $_menu = $this->getHtml('level-top') ?>

<?php echo var_dump($_menu) ?>
<?php if($_menu ==  ""): ?>

<div class="nav-container">
    <ul id="nav">
    <?php echo 'test test test' ?>
        <?php echo $_menu ?>
    </ul>
</div>
<?php endif ?>

and istead of menu, it prints out string "" and test test test, meaning that I am not getting $menu back...

see this

MY menu does show at all, can somebody tell me whats happening with me?

my page.xml holds

 <block type="page/html_header" name="header" as="header">
                <block type="page/template_links" name="top.links" as="accountLinks"/>
                <block type="page/switch" name="store_language" as="store_language" template="page/switch/languages.phtml"/>
                <block type="core/text_list" name="top.menu" as="topMenu" translate="label">
                    <label>Navigation Bar</label>
                    <block type="page/html_topmenu" name="catalog.topnav" template="page/html/topmenu.phtml"/>
                </block>
                <block type="page/html_wrapper" name="top.container" as="topContainer" translate="label">
                    <label>Page Header</label>
                    <action method="setElementClass"><value>top-container</value></action>
                </block>
</block> 

for menu inclusion..

please help me..I am near to striking my head with wall

Answer 1

Have you tried reindexing your site? Todo so goto Magento's Admin > System > Index Management, select any Indexes that may need their Data Reindexed, and click Submit.

Answer 2

Try changing

<?php $_menu = $this->getHtml('level-top') ?>

to

<?php $_menu = $this->getHtml('topMenu') ?>

level-top is not declared.