Header Problem

:  roll

I followed this tutorial: http://www.punres.org/doku.php?id=dev:s ? go_via_css
on adding a header with css but it doesn't diplay:

I placed my header image in the following directory:  /forums/img/header/header.gif

then I went to mystyle_cs.css and added this:

/* header logo */
.pun H1
{

/* your logo and position */
background-image: url(forums/img/header/header.gif);
background-repeat: no-repeat;
background-position: left; /* you set your logo position here */
display: block;
height: 125px; /* logo height in here add width: size px if u need*/
}

/*header title*/
.pun H1 span
{
/* your font style */
color: #0066B9;
font-size: 20px; /* title size */
font-family: Verdana, Arial, Helvetica, sans-serif;
text-transform: none ; /* transform text: uppercase, capitalise */
text-decoration: underline; /* decoration: none, overline */

/* position for your text (board title) with the logo */
position: absolute;
top: 40px;
left: 90px;
}

Then I went to mystyle.css and removed .pun H1

Here is the forum http://www.carinafuller.com/forums/

Am I missing something here?

Thank you!
Dada