multiply submenu

Hey again!

I wrote yesterday about a submenu!
Now i figured out that I just used the wrong menu in settings!

I have under one of the options in the menu a submenu, and in one of the options in the submenu i have a submenu too.. But the 2nd submenu isn’t showed..

I use the CSS below and again i’m not compatible with it so i need someone to include it for me.. ??

#nav a, #subMenusContainer a {
    display: block;
    text-decoration: none;
}
#nav a {
    color: #FFFFFF;
    float: left;
    font-size: 11px;
    font-weight: bold;
    margin-bottom: 0;
    margin-left: 0;
    margin-right: 0;
    padding: 12px 14px;
    text-transform: uppercase;
}
#subMenusContainer a, #nav li li a {
    background-color: #DDDDDD;
    color: #302F2F;
    font-size: 12px;
    padding: 6px 24px;
    text-align: left;
    text-shadow: none;
}
#nav li a:hover, #nav li a:focus, #nav a.mainMenuParentBtnFocused {
    background: none repeat scroll 0 0 #0681c4;
    color: #FFFFFF;
}
#subMenusContainer a:hover, #subMenusContainer a:focus, #subMenusContainer a.subMenuParentBtnFocused {
    background-color: #E9E9E9;
    color: #302F2F;
    text-shadow: none;
}
.subMenuParentBtn {
    background: url("../img/arrow_right.gif") no-repeat scroll right center transparent;
}
.subMenuParentBtnFocused {
    background: url("../img/arrow_right_over.gif") no-repeat scroll right center transparent;
}
.mainMenuParentBtn {
}
.mainMenuParentBtnFocused {
}
.smOW {
    display: none;
    margin: 0 0 0 -2px;
    overflow: hidden;
    padding: 0 2px;
    position: absolute;
}
#nav, #nav ul, #nav ol, #subMenusContainer ul, #subMenusContainer ol {
    line-height: 1em;
    list-style: none outside none;
    margin: 0;
    padding: 0;

}
#nav ol, #nav ul, #subMenusContainer ul, #subMenusContainer ol {
    background: none repeat scroll 0 0 transparent;
    left: 0;
}

#nav li {
    border-right: 1px solid #333333;
    cursor: pointer;
    display: inline;
    float: left;
    height: 35px;
    margin: 7px 0 0;
    padding: 0;

}
#nav li:first-child {
    background: none repeat scroll 0 0 transparent;
}
#subMenusContainer li {
    list-style: none outside none;

}
#nav {
    clear: both;
    display: block;
    font-size: 11px;
    margin: 0 auto;
    overflow: hidden;
    text-shadow: 0 1px 0 #000000;
    width: 916px;
}
#nav .children {
    display: none;
}
#subMenusContainer {
    display: block;
    height: 0;
    left: 0;
    overflow: visible;
    position: absolute;
    top: 0;
    width: 100%;
    z-index: 1000000000;
}