kann Breite der Buttons nicht ändern CSS

[hexilein]

Ich nochmal,leider ist der CSS Code nicht vollständig gewesen ,darum jetzt noch einmal:

``

body {
                font-family: arial, helvetica, serif;
                 background:  url(BILDER/hintergrund1.jpg);
}

#header
{
background-color:#FFCC00;
border-top: 5px solid #990000;
border-right: 5px solid #990000;
border-bottom: 5px solid #990000;
border-left: 5px solid #990000;
margin-bottom: 30px;

}

#nav, #nav ul { /* all lists */

padding: 0;
                margin: 0;
                list-style: none;
                float : left;
                width : 11em;
        }

#nav li { /* all list items */
                position : relative;
                float : left;
                line-height : 1.25em;
                margin-bottom : -1px;
                width: 15em;
        }

#nav li ul { /* second-level lists */
                position : absolute;
                left: -999em;
                margin-left : 11.05em;
                margin-top : -1.35em;

}

#nav li ul ul { /* third-and-above-level lists */
                left: -999em;
        }

#nav li a {
                width: 11em;
                w\idth : 9.5em;
                display : block;
                color : black;
                font-weight : bold;
                text-decoration : none;
                background-color :#FFCC00 ;
                border : 4px solid #990000;
                padding : 0 0.5em;
        }

#nav li a:hover {
                color : red;
                background-color : black;
        }

#nav li:hover ul ul, #nav li:hover ul ul ul, #nav li.sfhover ul ul, #nav li.sfhover ul ul ul {
                left: -999em;
        }

#nav li:hover ul, #nav li li:hover ul, #nav li li li:hover ul, #nav li.sfhover ul, #nav li li.sfhover ul, #nav li li li.sfhover ul { /* lists nested under hovered list items */
                left: auto;
        }

#content {
                margin-left : 12em;
        }