Twentyten menu goes behind body

Hi,

i am using the Twentytenmenu for my theme.
No is the twentytenmenu going behind my body. What is going wrong?

BODY
{
	background-image: url(images/body-bg.png);
	background-repeat: repeat-x;
	background-color: #DADADA;
	padding: 0px;
	margin: 0px;
	font-family: Corbel, "Trebuchet MS", Arial;
	font-size: 11pt;
}

the css code of the twentytenmenu is not changed.