Transmorgified Frustrations

[weber_dubois22]

Hey, guys, I searched the transmorgified tag in hopes that I would find an answer but came across none, so here's my problem.

I'm using a transmorgified layout by visualwit and I want to add a header image to it. However, every time I attempt to use the following codes:

.module-navlinks { top: 315px; }

#header { margin-top: 312px; }

#canvas {
background-image:url("URL HERE");
background-position: right top;
background-repeat:no-repeat;
}

or

#canvas {
background-image: url(URL HERE);
background-repeat: no-repeat;
nackground-position: top center;
padding-top: 350px;
}

It never appears, the layour remains the same. Does anyone have a override or workaround for this particular custom style sheet that will allow me to put a header at the top of the layout? I really don't want to go looking for another layout in an already small collection of choices.