font size not working

Hey Guys i think that it based on how the developer organized the CSS file you may need to modify typeface requirements in a number of locations inside the design css – especially if you want to modify going designs. Generally the font will be announced in the body tag like this:

body {
font-family: Verdana, Arial, sans-serif;
font-size: 12px;
color: #CCCCCC;
line-height:20px;
background-color: #222222;
}

I am under joomla 2.5.4 with the lastest version of cufon, with firefox/IE/chromium size is the same even if i change the size in the Font Font-size option (i.e. 36px)
i tried putting this into the template.css with no effects :
.cufon-active h1 { /* for Cufon.replace('h1') */
font-size: 36px;
}

What is wrong ?
Thanks