Page and Comments Background Not Working

I can not for the life of me get this to work. First off, here is the site: https://www.zimsgizmos.org/blogger That is what I am using to get this working before carrying the theme over to the main site, but anyways, if you look through it, you will notice that the main part seems to work just fine, but if you click on the Sample Page link the partial transparency disappears and becomes full transparency. The same thing occurs if you look at the comments. I can not find where I need to go to fix this. I am using the Twenty Ten theme for the basis of my editing. In case you need it, this is the coding I’m using to give the partial transparency, along with changing the background line to “background: transparent”:

/*
.alpha60 {
background: rgb(0, 0, 0);
background: rgba(0, 0, 0, 0.6); filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000);
-ms-filter: “progid:DXImageTransform.Microsoft.gradient(startColorstr=#99000000, endColorstr=#99000000)”;
};
*/

Please help!

Important Note: It seems the transparency does not work with IE 9, just fyi.