小编use*_*071的帖子

我正在使用 twitter bootstrap 并希望将表单向导与验证结合起来。但是在尝试了很多之后，表单向导和验证在下一个按钮上不起作用。我犯错的地方。我的编码如下

<div class="portlet-body form">
                        <form action="#" id="form_sample_2" class="form-horizontal">
                           <div class="form-wizard">
                              <div class="navbar steps">
                                 <div class="navbar-inner">
                                    <ul class="row-fluid nav nav-pills">
                                       <li class="span3 active">
                                          <a href="#tab1" data-toggle="tab" class="step active">
                                          <span class="number">1</span>
                                          <span class="desc"> Registration</span>   
                                          </a>
                                       </li>
                                       <li class="span3">
                                          <a href="#tab2" data-toggle="tab" class="step">
                                          <span class="number">2</span>
                                          <span class="desc"> Review Application</span>   
                                          </a>
                                       </li>
                                     </ul>
                                 </div>
                              </div>
                              <div id="bar" class="progress progress-success progress-striped">
                                 <div class="bar" style="width: 25%;"></div>
                              </div>
                              <div class="tab-content background-color-blue">
                                 <div class="tab-pane active" id="tab1">
                                    <h3 class="block">Registration</h3>
                                    <div class="control-group">
                                       <label class="control-label">UserName:</label>
                                       <div class="controls span8"> …

$fname = addslashes($fname);
$lname = addslashes($lname);
$dob = addslashes($dob);
$email = $_POST['email'];
$sql = 
 "INSERT INTO subscriber 
    (fname, lname, dob) 
  VALUES
    ('".$fname."', '".$lname."', '".$dob."') 
  WHERE email='".$email."'";

$register = mysql_query($sql) or die("insertion error");

我在SQL查询"插入错误"中收到错误.查询是在删除WHERE语句后将数据插入DB.什么是错误.