TabContainer

Hey guys i have a problem....My TabContainer tabs' text doesn't show properly...

Reference : http://tinypic.com/r/j9lcfp/5

I tried changing the height of header and tabs it didn't work 

.ajax__tab_xp .ajax__tab_header
{
    height:21px;
    font-family: Arial, helvetica, sans-serif;
    font-size: 30px;
    color: #3a3a3a;
    display:table;
}

.ajax__tab_xp  .ajax__tab_tab
{
padding: 4px 30px;
width:80px;
}