When I click on the link every works perfect. And when I click on the left arrow to go back everything goes perfect. But if I click on my index.html instead of previous page, the links doesn't work anymore. The underline doesn't show up and I can't click it. Can you help me?

HTML Code:
.left-topic-title a:link
{
  color: #FFFFFF;
  text-decoration: none;
}

.left-topic-title a:visited
{
  text-decoration: none;
  color: #FFFFFF;
}

.left-topic-title a:hover
{
  text-decoration: underline;
  color: #FFFFFF;
}

.left-topic-title a:active 
{
  text-decoration: underline;
  color: #FFFFFF;
}