active menu issue

how to make the WordPress Dynamic Menu to active. Im using

this code

.main-navigation {
//background:#fff;
color: #000000;
background: rgb(250,250,251); /* Old browsers */
background: -moz-linear-gradient(top, rgba(250,250,251,1) 0%, rgba(210,212,216,1) 100%, rgba(216,208,239,1) 100%, rgba(210,212,216,1) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(250,250,251,1)), color-stop(100%,rgba(210,212,216,1)), color-stop(100%,rgba(216,208,239,1)), color-stop(100%,rgba(210,212,216,1))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(250,250,251,1) 0%,rgba(210,212,216,1) 100%,rgba(216,208,239,1) 100%,rgba(210,212,216,1) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(250,250,251,1) 0%,rgba(210,212,216,1) 100%,rgba(216,208,239,1) 100%,rgba(210,212,216,1) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(250,250,251,1) 0%,rgba(210,212,216,1) 100%,rgba(216,208,239,1) 100%,rgba(210,212,216,1) 100%); /* IE10+ */
background: linear-gradient(to bottom, rgba(250,250,251,1) 0%,rgba(210,212,216,1) 100%,rgba(216,208,239,1) 100%,rgba(210,212,216,1) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr=’#fafafb’, endColorstr=’#d2d4d8′,GradientType=0 ); /* IE6-9 */

font-size: 15px; /* Font awesome icons */
margin: 0 -35px -20px -35px;
height: 45px;

}

.main-navigation ul {
list-style: none;
margin: 0;
padding-left: 0;
zoom: 1; /* Second level menu items */
font-family: century gothic;
}

.main-navigation ul:before {
content: ”;
display: block;
}

.main-navigation ul:after {
clear: both;
content: ”;
display: table;
}

.main-navigation ul li {
position: relative;
color: #000000;
display: block;
float: left;
}

.main-navigation ul li:hover > a {
zoom:110%;
background: #86aecc;
//background: #00bcff;
color: #000000;
}

.main-navigation ul li:hover > a [class^=”icon-“] {
//color: #FFFFFF;
color: #000000;
}

.main-navigation ul li a {
-ms-box-sizing: border-box;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
padding-top: 14px;
padding-right: 35px;
padding-bottom: 6px;
padding-left: 35px;
-webkit-transition: all 2s ease-out 1s;
-moz-transition: all 2s ease-out 1s;
-ms-transition: all 2s ease-out 1s;
-o-transition: all 2s ease-out 1s;
transition: all 2s ease-out 1s;
font-size:14px;}

.main-navigation ul li a,
.main-navigation ul li a > * {
-webkit-transition: all 0.4s ease;
-moz-transition: all 0.4s ease;
-o-transition: all 0.4s ease;
transition: all 0.4s ease;
color: #000000;
}

.main-navigation ul ul {
position: absolute;
top: 100%;
left: 50%;

background: #CADDEA;
-webkit-box-shadow: 0 1px 2px rgba(0,0,0,0.15); /* Third Level Items */
-moz-box-shadow: 0 1px 2px rgba(0,0,0,0.15); /* Third Level Items */
box-shadow: 0 1px 2px rgba(0,0,0,0.15);
margin-left: -100px; /* Third Level Items */
opacity: 0;
pointer-events: none;
-webkit-transition: all 0.35s ease; /* Third Level Items */
-moz-transition: all 0.35s ease; /* Third Level Items */
-o-transition: all 0.35s ease; /* Third Level Items */
transition: all 0.35s ease;
visibility: hidden;
z-index: 99999;
}

.main-navigation ul ul a {
width: 200px;
font-size:12px;
padding: 10px 10px;
}

.main-navigation ul ul li {
position: relative;

}

.main-navigation ul ul li:hover > a {
//background:#54607D;
background:#86AECC;
color: #000000;
}

.main-navigation ul ul ul {
top: 0;
left: 100%;

margin-left: 0;
}

.main-navigation ul li:hover > ul {
opacity: 1;
pointer-events: auto;
visibility: visible;
}

.main-navigation a {
color: #e2e2e2;
display: block;
font-weight: bold;
text-decoration: none;
}

.main-navigation.sticky {
-webkit-box-shadow: 0 2px 1px rgba(0,0,0,0.15);
-moz-box-shadow: 0 2px 1px rgba(0,0,0,0.15);
box-shadow: 0 2px 1px rgba(0,0,0,0.15);
}

.main-navigation [class^=”icon-“] {
color: #CCCCCC;
display: inline-block;
font-size: 16px;
line-height: 0.5em;
margin-right: 15px;
}

.mobile-nav-frame [class^=”icon-“] {
margin-right: 10px;
}

#search-icon {
position: relative;

float: right;
}

#search-icon #search-icon-icon {
width: 39px;
height: 43px;
padding-left:10px;
background: #303134 url(./images/sprites/search.png) no-repeat;
border-left: 1px solid #2e2f31;
cursor: pointer;
-webkit-transition: all 0.25s ease;
-moz-transition: all 0.25s ease;
-o-transition: all 0.25s ease;
transition: all 0.25s ease;
}

#search-icon #search-icon-icon:hover {
background: #00bcff url(./images/sprites/search-white.png) no-repeat;
}

#search-icon .searchform {
position: absolute;
top: 100%;
right: 0;
width: 1080px;

background: #2d2e31;
display: none;
overflow-x: hidden;
z-index: 10;
}

#search-icon .searchform input[name=s] {
width: 100%;
height: 42px;

background: transparent;
border: none;
-webkit-border-radius: 0px;
-moz-border-radius: 0px;
border-radius: 0px;
-ms-box-sizing: border-box;
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
color: #d1d1d1;
display: block;
font-size: 17px;
font-weight: 200;
outline: none;
padding: 0 15px;
}