Transparency Header with Revolution Slider

Hi guys,

Great work on the theme!
I have been trying to make a transparent layer header using various ways like http://www.therocks.church , I know they are using Enfold.
But it just doesnt work on my site, my page is http://www.meetinggrace.com.au/newhome

Could somebody help?

I use the following code:

.alternate_color, .alternate_color .site-background, .alternate_color .first-quote, .alternate_color .related_image_wrap, .alternate_color .gravatar img .alternate_color .hr_content, .alternate_color .news-thumb, .alternate_color .post-format-icon, .alternate_color .ajax_controlls a, .alternate_color .tweet-text.avatar_no, .alternate_color .toggler, .alternate_color .toggler.activeTitle:hover, .alternate_color #js_sort_items, .alternate_color.inner-entry, .alternate_color .grid-entry-title, .alternate_color .related-format-icon, .grid-entry .alternate_color .avia-arrow, .alternate_color .avia-gallery-big, .alternate_color .avia-gallery-big, .alternate_color .avia-gallery img, .alternate_color .grid-content, .alternate_color .av-share-box ul, #top .alternate_color .av-related-style-full .related-format-icon, .alternate_color .related_posts.av-related-style-full a:hover, .alternate_color.avia-fullwidth-portfolio .pagination .current, .alternate_color.avia-fullwidth-portfolio .pagination a, .main_color, .main_color .site-background, .main_color .first-quote, .main_color .related_image_wrap, .main_color .gravatar img .main_color .hr_content, .main_color .news-thumb, .main_color .post-format-icon, .main_color .ajax_controlls a, .main_color .tweet-text.avatar_no, .main_color .toggler, .main_color .toggler.activeTitle:hover, .main_color #js_sort_items, .main_color.inner-entry, .main_color .grid-entry-title, .main_color .related-format-icon, .grid-entry .main_color .avia-arrow, .main_color .avia-gallery-big, .main_color .avia-gallery-big, .main_color .avia-gallery img, .main_color .grid-content, .main_color .av-share-box ul, #top .main_color .av-related-style-full .related-format-icon, .main_color .related_posts.av-related-style-full a:hover, .main_color.avia-fullwidth-portfolio .pagination .current, .main_color.avia-fullwidth-portfolio .pagination a {
	background-color: rgba(255,255,255,.5) !important;
}

.header_color .header_bg, .header_color .main_menu ul ul, .header_color .main_menu .menu ul li a, .header_color .pointer_arrow_wrap .pointer_arrow, .header_color .avia_mega_div, .header_color .av-subnav-menu > li ul, .header_color .av-subnav-menu a {
    background-color: rgba(255,255,255,.5) !important;
    color: #808080;
}

#main, .html_stretched #wrap_all {
background-color: transparent !important;
}