BootStrap Footer Problem

HTML

<script src="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<section>
	
		<div class="container alignLeft fitHeight">
		
			<div class="row">
	        	<div class="col-md-12">
		        	<div class="scuole">
						<h1 class="page-header">Scuole associate al DS</h1>
					</div>
	       		</div>
	        </div> 
	        
	        
	        
			    <div class="panel-group" id="accordion_" role="tablist" aria-multiselectable="true">
			    
			    
			        <div class="panel panel-default">
			            <div class="panel-heading" role="tab" id="headingOne_0">
			                <h4 class="panel-title">
			                    <a role="button" data-toggle="collapse" data-parent="#accordion" href="#CollapseContent_0" aria-expanded="true" aria-controls="CollapseContent">
			                        AGIS014002 - I.I.S.S. "MICHELE FODERA'"
			                    </a>
			                </h4>
			            </div>
			
			            <div id="CollapseContent_0" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne">
			                <div class="panel-body">
			                	<div class="container">
        							<div class="row">
        							
        								<!-- Column 1: PROGETTI -->
            							<div class="col-md-6">
			                    			
			                    			
			                    			<!-- Bottone relativo ai progetti WIFI: -->
			                    			<a title="WIFI" href="javascript: void(0)" id="showWifi_0" class="showWifi">
												<div class="news_box news_box_01 hvr-underline-from-center " style="margin-right: 50px;"></div>
											</a>
												
											<!-- Bottone relativo ai progetti PNSD: -->
											<a title="PNSDe" href="javascript: void(0)" id="showPnsd_0" class="showPnsd">
												<div class="news_box news_box_02 hvr-underline-from-center...

CSS

@import url('//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css');


body{
    text-align: center;
}
.error {
	padding: 3px;
	margin-bottom: 5px;
	border: 1px solid transparent;
	color: red;

}

 h3{
 	text-align:center;
 }
.msg {
	padding: 15px;
	margin-bottom: 20px;
	border: 1px solid transparent;
	border-radius: 4px;
	color: #31708f;
	background-color: #d9edf7;
	border-color: #bce8f1;
}

.linkCell{ padding-top:20px;}


.button-disabled{
	    color: grey;
}


header {
    /* background-image: linear-gradient(#04519b, #044687 60%, #033769); */
    background-image: linear-gradient(#0297c2, #03bbd7 60%, #18bed7);
    color: #fff;
    min-height: 250px;
    padding-top: 25px;
    padding-bottom: 25px;
}

.menuHeader {
	min-height: 80px !important;	
	text-align: left !important;
}

header .logo {
    float: left;
    width: 170px;
    
}

#login-box {
	float: right;
	border: 0 !important;
	margin: 0 !important;
	padding: 25px !important;
	width: auto !important;
	background: none !important;
	
}



header form {
    float: right;
}

#ricorda {
	float: right;
}


.headerDiv {
    /* background-image: linear-gradient(#04519b, #044687 60%, #033769); */
    background-image: linear-gradient(#0297c2, #03bbd7 60%, #18bed7);
    color: #fff;
    min-height: 250px;
    padding-top: 25px;
    padding-bottom: 25px;	
}

/*
.container  p{

    text-align: justify !important;
}
*/



.headerDiv .container .logo {
	float: left;
}

.form-inline .radio, .form-inline .checkbox {
	float: right !important;
}

i.glyphicon-home {
	font-size: 1.84em;
	margin-right: 10px;
}

i.glyphicon-user {
	font-size: 1.84em;
	margin-left: 10px;
}

#menuTi.group-item i {
    float: right;
    margin-right: 15px;
    width: 80px;
}

.textOnRight {
	text-align: right !important;
	float: right;
}

#menuTitle {
	font-size: 1.4em;
	text-align: center;
	
}

.group-item {
    border-bottom: 1px solid #ccc;
    margin-bottom: 20px;
    overflow: auto;
    padding-bottom:...