I got it. 
thank you Kobra!
this is the code I used to fix it.
Code:
/*wrappers - page or section containers*/
#mainWrapper {
text-align: left;
width: 950px;
vertical-align: top;
background:#fff;
border-left:px solid #c4c4c4;
border-right:px solid #c4c4c4;
}
#headerWrapper, #contentMainWrapper, #logoWrapper, #cartBoxListWrapper, #ezPageBoxList, #cartBoxListWrapper ul, #ezPageBoxList ul, #mainWrapper, #popupAdditionalImage, #popupImage {}
#headerWrapper{
background:#e1f6c5 url(../images/usa/bg.jpg);}
#logoWrapper{
height:140px;
width: 950px;
background:url(../images/header_bg.gif);}
#headerWrapper{
padding-top: 20px;
}