I'm experiencing a problem with the menu links at the top on my home page. When I hover over one of the menu links, the second-level menu does not appear. However, when I click on the link and it takes me to a different page, and then hover over the menu link, the second-level menu does appear. I'm fairly new at Drupal and I'm not sure how to fix this. This happened with me using the CorporateClean theme as well. Any help would be appreciated. Thanks!