form under div is not accessible to style in css

[zub2020]

i have an .aspx content page for which i used a stylesheet in css. but i can not apply my stylesheet to "form#formleft" .
any help would be tremendously appreciated.

my stylesheet =>

*{
	margin:0;
	padding:0;
}

body {
	background: url(../images/bg-body.gif) repeat-x 0px 0px;
	font-family: Georgia,sans-serif;
}

#container {
	width:1100px;
	margin:0 auto;
	padding:0 0;
}

#header{
	position:relative;
	width: 100%;
}

#header h1{
	display:block;
	float:left;
	width:302px;
	height:293px;
	background:url(../images/logo.gif) no-repeat 0 0;
	text-indent:-9999px;
}

#header h1 a{
	display:block;
    height:100%;
	width:100%;
}

#header #pic{
	display:block;
	background:url(../images/steve.jpg) no-repeat right 0px;
	height:280px;
	width:790px;
	position:absolute;
	top:10px;
	right:0px;
	text-indent:-9999px;
}

#nav{
	clear: both;
	height: 35px;
	width: 100%;
}
#nav ul{
	float: left;
}
#nav ul li{
	list-style-type: none;
	display: block;
	height: 35px;
	float: left;
	padding: 0px 1px 0px 0px;
}
#nav ul li a{
	color: #3f3f3f;
	display: block;
	text-decoration: none;
	font-size: 12px;
	font-weight: normal;
	text-transform: uppercase;
	height: 100%;
	line-height: 35px;
	padding: 0 0 0 18px;
}
#nav li a span{
	display: block;
	float: left;
	height: 100%;
	padding: 0 18px 0 0;
}
#nav li a:hover, #nav li.active a{
	background: url(../images/hover.gif) no-repeat left;
	color: #fff;
	cursor: pointer;
	text-decoration: none
}
#nav li.active a span, #nav li a:hover span{
	background: url(../images/hover.gif) no-repeat right;
}

#search-container{
	float:left;
	width:1060px;
	height:340px;
	background:#fff;
	margin:32px 0 60px 0;
	padding:20px;
	-moz-box-shadow: 3px 3px 4px #000;
	-webkit-box-shadow: 3px 3px 4px #000;
	box-shadow:3px 3px 4px #000;
}

#searchContainer{
	float:left;
	width:700px;
	height:400px;
	background:url(../images/search-bg.jpg) repeat-x 0 0;
	margin-right:20px;
	/* text-indent:-9999px; */
}

#search{
	float:left;
	width:100%;
	height:100%;
	padding:0px 20px;
}

form#formleft{
	margin:50px 20px;	
}

#formleft h2,#loginform h2{
	font:normal normal 24px "Trebuchet MS",Tahoma;
	margin-top:15px;
	margin-bottom:15px;
}

#formleft label,#loginform label{
	font:normal bold 15px "Trebuchet MS",Tahoma;
	margin-top:10px;
	margin-bottom:10px;
	display:block;
	float:left;
	width:100%;
}

form#formleft input,#loginform input{
	background-color: #fff;
	border:1px solid #ddd;
	color: #666;
	float: left;
	font: 12px Arial, Helvetica, sans-serif;
	margin: 5px 0 8px;
	padding: 8px;
	width: 240px;
	-webkit-border-radius: 3px;
	-moz-border-radius: 3px;
	-moz-box-shadow: 3px 3px 4px #000;
	-webkit-box-shadow: 3px 3px 4px #000;
	box-shadow:3px 3px 4px #000;
}

form#formleft input.btn{
	width: auto;
	display:block;
	border: none;
	padding: 0;
	margin-left: 50px;
	-moz-box-shadow: 3px 3px 4px #000;
	-webkit-box-shadow: 3px 3px 4px #000;
	box-shadow:4px 4px 4px #000;
}

#login-container{
	float:left;
	width:340px;
	height:400px;
	background:url(../images/search-bg.jpg) repeat-x 0 0;
	/* text-indent:-9999px; */
}

#login{
	float:left;
	width:100%;
	height:100%;
	padding:0px 20px;
}

#loginform a{
	text-decoration:none;
	clear:both;
	float:left;
	font:normal bold 15px "Trebuchet MS",Tahoma;
	color:black;
	margin-top:10px;
}

#loginform .btn2{
	width: auto;
	display:block;
	clear:both;
	border: none;
	padding: 0;
	margin-left: 0;
	-moz-box-shadow: 3px 3px 4px #000;
	-webkit-box-shadow: 3px 3px 4px #000;
	box-shadow:4px 4px 4px #000;	
}

#content{
	clear:both;
	margin:60px 0;
	width:100%;
	height:300px;
	background:url(../images/search-bg.jpg) repeat-x 0 0;
	-moz-box-shadow: 3px 3px 4px #000;
	-webkit-box-shadow: 3px 3px 4px #000;
	box-shadow:3px 3px 4px #000;
}


#footer{
	clear: both;
	background: url(../images/footer_bg.jpg);
	height: 100px;
	width: 100%;
	margin-top: 40px;
}
#footerContainer{
	margin: 0px auto 0;
	width: 1100px;
	font-size: 12px;
	color: #ddd;
	padding-top: 20px;
	position: relative;
}
#footerContainer p{
	margin: 8px 0 8px;
}
#footerContainer a{
	color: #ddd;
	text-decoration: none;
}
#footerContainer a:hover{
	text-decoration: underline;
}
form#newsletter{
	position: absolute;
	right: 0;
	top: 20px;
	width: 350px;
}
form#newsletter label{
	font-weight: bold;
	color: #fff;
}
form#newsletter input{
	background-color: #fff;
	border:1px solid #ddd;
	color: #666;
	float: left;
	font: 12px Arial, Helvetica, sans-serif;
	margin: 5px 0 0;
	padding: 8px;
	width: 190px;
	-webkit-border-radius: 5px;
	-moz-border-radius: 5px;
}
form#newsletter input.btn{
	width: auto;
	border: none;
	padding: 0;
	margin-left: 3px;
}

default.apsx =>

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="false"
	CodeFile="Default.aspx.cs" Inherits="_Default" %>

<asp:Content id="Content1" ContentPlaceHolderID="searchcontainer" runat="server">
	<div id="searchContainer">
		    <div id="search">
		   	<form id="formleft" action="">
		   		<h2>Search Courses and Institutes</h2>
		   		<label>Course</label>
		   		<input type="text" name="course"/>
		   		<label>Institute</label>
		   		<input type="text" name="institute"/>
		   		<label>Location</label>
		   		<input type="text" name="location"/>
		   		<input type="image" class="btn" src="images/submit_btn.jpg"/>
		   	</form>
		    </div>
	</div>
	<!-- login-container -->
	<div id="login-container">
		<div id="login">
		   	<form id="loginform" action="">
		   		<h2>Sign In</h2>
		   		<label>Email Id or Contact Number</label>
		   		<input type="text" name="emailph"/>
		   		<label>Password</label>
		   		<input type="password" name="password"/>
				<input type="image" class="btn2" src="images/submit_btn.jpg"/>
		   		<a href="Register.aspx">New User Register Here</a>
			</form>
		</div>
    </div>
</asp:Content>

<asp:Content id="Content2" ContentPlaceHolderID="maincontent" runat="server">
</asp:Content>

MASTER PAGE =>

<%@ Master Language="C#"%>
<html lang="en">
<head>
	<title></title>
	<asp:ContentPlaceHolder id="head"></asp:ContentPlaceHolder>
	<link rel="stylesheet" href="css/styles.css" type="text/css"/>
</head>
<body>
	<form id="masterform" runat="server">
	<!-- container -->
	<div id="container">
		<!-- header -->
		<div id="header">
			<h1><a href="index.html">institutes india</a></h1>
			<div id="pic"><span>background pic of students</span></div>
		</div>
		<!-- nav -->
		  <div id="nav">
		    <ul>
		      <li class="active"><a href="#"><span>Home</span></a></li>
		      <li><a href="#"><span>Courses</span></a></li>
		      <li><a href="#"><span>Institutes</span></a></li>
		      <li><a href="#"><span>Coaching Institutes</span></a></li>
		      <li><a href="#"><span>Ask Your Query</span></a></li>
		      <li><a href="#"><span>Add Your Institutes</span></a></li>
		      <li><a href="#"><span>Articles</span></a></li>
		      <li><a href="#"><span>About Us</span></a></li>
		    </ul>
	    </div>
	    <!-- end nav -->

	<!-- search-container -->
	    <div id="search-container">
		<asp:ContentPlaceHolder id="searchcontainer" runat="server"></asp:ContentPlaceHolder>	
	    </div>
	    <!-- end search-container -->
		<div id="content">
			<asp:ContentPlaceHolder id="maincontent" runat="server"></asp:ContentPlaceHolder>
		</div>
	</div>	
	<!-- end container -->
	<div id="footer">
	  <div id="footerContainer">
	    <p>Copyright © 2012 instituteindia  |  <a href="#">Privacy Policy</a></p>
	    <p><a href="#">Home</a> /<a href="#">Institutes</a> /  <a href="#">Courses</a> /  <a href="#">Coaching Institutes</a> /  <a href="#">Ask Your Query</a> /  <a href="#">Articles</a> /  <a href="#">Contact Us</a></p>
	    <form id="newsletter" action="#" method="post">
		<label>Enter your email to subscribe for  RSS Updates</label>
		<input type="text" class="textBox" />
	      <input class="btn" type="image" src="images/subscribe_btn.jpg"/>
	    </form>
	  </div>
	</div>
	</form>
</body>
</html>