Need help with button css

http://www.partyaces.com

Trying to get the button text be to 25px. This code seemed to work earlier then has stopped. The button preview shows 25px text, but the actual page does not. Strange thing is, that now when I change the font-size to anything other than 25px it does not change the preview or the site.

.avia-button.avia-size-large {
padding: 25px 20px 23px;
font-size: 25px;
min-width: 250px;
}