Hi sergiosp
Since your RokSprocket module is covering all the block with image you can adopt a custom solution only for your home page as shown in img below
To have this layout you should create a custom class for your home menu item and add to your custom.css this code
.layout-slideshow .sprocket-features-content {
top:160px!important;
}
This will move the description block of roksprocket 160px bottom
then create a custom class for your home menu item only in this way
.t3-header .homepage {
background:color:#000;
}
Then edit your home menu item and add the custom class as showed below
Hope it can help
P.S.
Your super user details you added in your first post are not working , i cannot login at your backend kindly restore them.