Changing Header but problem (margins ?)

hello people !

I’m using (a slightly modified) Kubrick Template.
Url is http://www.soizicstokvis.net/

I changed the header, modified the size to 270×760 px.
Everything was looking fine.

But i wanted the header bigger ! So i did a new image, 330×760.
You can see it there : http://www.soizicstokvis.net/wp-content/themes/amelie/images/ekh-soizic.jpg

Then I’ve done some changes in header.php and style.css but something is going wrong…

Here are the changes I made:

– in header.php
#header { margin: 0 !important; margin: 0 0 0 1px; padding: 1px; height: 330px; width: 760px; }
#headerimg { margin: 7px 9px 0; height: 330px; width: 760px; }

– in style.css
#header {
padding: 0;
margin: 0 auto;
height: 330px;
width: 100%;
background-color: #73a0c5;
}

#headerimg {
margin: 0px;
height: 330px;
width: 100%;
/*border: 1px solid black;*/
}

Thank you for your help !
amélie