Can't get dropdown to work when added to existing nav bar.

I am trying to add dropdown submenus to an existing nav bar but I can't get anything to work. Could someone help me out? Code is below. THANKS!

HTML:

<div id="header2">
            <header>
                <div id='cssmenu'>
                    <ul>
                        <li class='active'><a href='index.html'><span>Home</span></a></li>
                        <li><a href='about.html'><span>About</span></a></li>
                        <li><a href='sponsors.html'><span>Sponsors</span></a></li>
                        <li><a href='#'><span>Streaming Schedule</span></a></li>
                        <li><a href='#'><span>Scores</span></a></li>
                            <ul>
                                <li><a href='#'><span>Scores</span></a></li>
                            </ul>
                        <li><a href='http://wabashvalleysports.blogspot.com/'><span>Blog</span></a></li>
                        <li class='last'><a href='#'><span>Contact</span></a></li>
                    </ul>
                </div>
            </header>
        </div>

Code:

@import url(http://fonts.googleapis.com/css?family=Open+Sans:700);
#cssmenu {
  background: #ff0000;
  width: auto;
}
#cssmenu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  line-height: 1;
  display: block;
  zoom: 1;
}
#cssmenu ul:after {
  content: ' ';
  display: block;
  font-size: 0;
  height: 0;
  clear: both;
  visibility: hidden;
}
#cssmenu ul li {
  display: inline-block;
  padding: 0;
  margin: 0;
}
#cssmenu.align-right ul li {
  float: right;
}
#cssmenu.align-center ul {
  text-align: center;
}
#cssmenu ul li a {
  color: #ffffff;
  text-decoration: none;
  display: block;
  padding: 15px 25px;
  font-family: 'Open Sans', sans-serif;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 14px;
  position: relative;
  -webkit-transition: color .25s;
  -moz-transition: color .25s;
  -ms-transition: color .25s;
  -o-transition: color .25s;
  transition: color .25s;
}
#cssmenu ul li a:hover {
  color: #333333;
}
#cssmenu ul li a:hover:before {
  width: 100%;
}
#cssmenu ul li a:after {
  content: '';
  display: block;
  position: absolute;
  right: -3px;
  top: 19px;
  height: 6px;
  width: 6px;
  background: #ffffff;
  opacity: .5;
}
#cssmenu ul li a:before {
  content: '';
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  background: #333333;
  -webkit-transition: width .25s;
  -moz-transition: width .25s;
  -ms-transition: width .25s;
  -o-transition: width .25s;
  transition: width .25s;
}
#cssmenu ul li.last > a:after,
#cssmenu ul li:last-child > a:after {
  display: none;
}
#cssmenu ul li.active a {
  color: #333333;
}
#cssmenu ul li.active a:before {
  width: 100%;
}
#cssmenu.align-right li.last > a:after,
#cssmenu.align-right li:last-child > a:after {
  display: block;
}
#cssmenu.align-right li:first-child a:after {
  display: none;
}

@media screen and (max-width: 768px) {
  #cssmenu ul li {
    float: none;
    display: block;
  }
  #cssmenu ul li a {
    width: 100%;
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    border-bottom: 1px solid #417b9c;
  }
  #cssmenu ul li.last > a,
  #cssmenu ul li:last-child > a {
    border: 0;
  }
  #cssmenu ul li a:after {
    display: none;
  }
  #cssmenu ul li a:before {
    display: none;
  }

 

Some free dropdown menu generators:



http://css3menu.com/
Fancy Drop Down Menus with Pure CSS!

Drop Down Menus
http://cssmenumaker.com/css-drop-down-menu

Free DropDown Menu Generator
http://css3menu.com/enterprise-green.html

How to Build a Cool CSS3 Menu
https://free-css-menu.com/css-dropdown-menu-generator.html

FREE CSS3 Menu
https://www.free-css-menu.com/css-drop-down-menus.html

CSS Menu Generator Free
http://css-menu-generator.software.informer.com/

hope this helps
falcon