Its because your #wrap
element is overlapping the clickable area, by overlapping your menu.
Change the CSS for #wrap
to:
#wrap {
width: 1300%;
margin: 0 auto;
margin-top: 94px; /* <-- offset by height of menu */
float: left;
}
.panel, #wrap {
height:100%;
overflow: hidden;
position: relative;
/* <-- removed margin-top from panel content */
}