Text Align

I am trying to center align my submenus using the following style on my site (http://drupal.panoramical.co.uk)

ul.nice-menu li.menuparent ul li {
  border-bottom: 0px;
  border-top: 0px;
  padding: 0px;
  height: 25px;
  background-color: red;
  width: 75px;
  text-align: center;
  }
 
ul.nice-menu li.menuparent ul li a {
  color: #3d679f;
  width: 75px;
  text-transform: capitalize;
  height: 25px;
  background-color: #fff;
  text-align: center;
  }

Would have thought that would work, but it completely ignores the text-align I put in there...can anybody help me?