[Theme: Yoko] Transparent Background

I use GIMP 2 to tranparent the background, however I can”t figure out how to upload it to wordpress with the transparent background. Gimp 2 offers different files and every photo currently on my site is a PNG. I change the photo to a PNG from a JPG and it still won’t grab the transparent back ground. Thiers my help another question sorry.

#body {
     background-color: transparent;
}

To make the Page background transparent I used this… currently looking for a fix to stop all images on the site from also becoming transparent ?? … a fix appreciated ??
https://www.johannamusic.com/wp/

#page {
max-width: 1102px;
margin: 12px auto;
padding:0 30px 30px;
background-color:#fff;
zoom: 1; /* gives the object layout */
-ms-filter: “progid:DXImageTransform.Microsoft.Alpha(Opacity=90)”;
filter: alpha(opacity=90);
-moz-opacity: 0.90;
-khtml-opacity: 0.90;
opacity: 0.90;
z-index: 0;
}