Function: multi-level navigation. / Plugin for version 2!

[vipdesign]

I downloaded the plugin and integrated successfully into the cms but I got the problem with browser Compatibility

- The submenu is OK with Firefox
- But in IE it doesn’t show the submenu when I hover the parent menu

I added the styles for this menu. But it also didn’t applied in IE also

Code:

<div id="topbar">
  <div class="wrapper">
    <div id="topnav">
    <?php menu_master(); ?>
    </div>
    <br class="clear" />
  </div>
</div>

Any help for browser Compatibility settings
Thank you.