Glassy header increase white transparency / opacity – Custom css not working

Hi there,

I want to increase the whiteness of a glassy header and the top bar. The below custom css works in Firebug, when I save the custom css in the custom css (general styling theme options) and reload the page, the transparency turns back to default:

#top .av_header_glassy.av_header_transparency #header_main {
background-color: rgba(255, 255, 255, 0.35)!important;
}

#top .av_header_transparency #header_meta {
background-color: rgba(255, 255, 255, 0.35)!important;
}

Why is the css change not taking effect after saving the theme options?

Please advise thanks