Why This Code is Not working

[Binu Mathew]

<?php
$con = mysql_connect("localhost","root","erd");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}

mysql_select_db("erd", $con);

if($_POST["Type"]='CA')
{
$type="College Admin";
}
if($_POST["Type"]='stud')
{
$type="Student";
}
$query="SELECT * FROM scmanager.user_login_details where userID= '".$_POST["userid"]."' AND password='".$_POST["psw"]."' and role='".$type."'";

$result=mysql_query($query) or die('error');
$numrows = mysql_num_rows($result);

if(!numrows)
{
if($_POST["Type"]='CA')
{
echo "<center>";
echo "<div class='main'>";
echo "<div class='box'>";
echo "Congrates! You got Loged In";
echo "<br><br>";
echo "<form action='ca/CAdminHome.php' method='post' name='myform'>";
echo "<input type='hidden' name='userID2' value='".$_POST["userid"]."'>";
echo "<input type='hidden' name='type2' value='".$_POST["Type"]."'>";
echo "<div class='spacer'><a href='#' onClick='document.myform.submit();' class='green'>Enter</a></div>";
echo "</form>";
echo "</div>";
echo "</div>";
echo "</div>";
echo"</center>";
echo "</body>";
}

elseif($_POST["Type"]='stud')
{

echo "<center>";
echo "<div class='main'>";
echo "<div class='box'>";
echo "Congrates! You got Loged In";
echo "<br><br>";
echo "<form action='Student/CAdminHome.php' method='post' name='myform1'>";
echo "<input type='hidden' name='userID2' value='".$_POST["userid"]."'>";
echo "<input type='hidden' name='type2' value='".$_POST["Type"]."'>";
echo "<div class='spacer'><a href='#' onClick='document.myform1.submit();' class='green'>Enter</a></div>";
echo "</form>";
echo "</div>";
echo "</div>";
echo "</div>";
echo"</center>";
echo "</body>";
}
else
{
Header("Location: http://127.0.0.1:8080/scmanager/relogin.php";);
exit;
}
}
mysql_close($con);
?>

I think there is an Error in the "if" code can u say what is that?