我正在构建一个 Asp.Net MVC 4 应用程序，并使用内置的登录/注册功能。当我输入错误的用户名和密码时，Chrome 会向我发送一个带有 html 代码而不是错误消息的页面。当我在 IE 中尝试相同的操作时，它会返回 json 文档并要求我保存它。我没有更改登录操作方法的代码。什么可能导致这种情况？
编辑：
它已启用。我的 web.config 中有那个键。这是生成的登录页面的 HTML：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Log in</title>
<link href="/favicon.png" rel="shortcut icon" type="image/x-icon" />
<link href="/Content/styles/flexslider.css" rel="stylesheet" />
<link href="/Content/styles/prettyPhoto.css" rel="stylesheet" />
<link href="/Content/styles/style.css" rel="stylesheet" />
<link href="/Content/themes/custom/jquery-ui-1.10.3.custom.css" rel="stylesheet" />
<script src="/Scripts/jquery.min.js" type="text/javascript"></script>
<script src="/Scripts/portfolio-filter.js"></script>
<script src="/Scripts/all-in-one.js"></script>
<script src="/Scripts/setup.js"></script>
<script src="/Scripts/main.js"></script>
<script src="/Scripts/jquery-ui-1.10.3.custom.js"></script>
<script src="/Scripts/jquery.unobtrusive-ajax.js"></script>
<script src="/Scripts/jquery.validate.js"></script>
<script src="/Scripts/jquery.validate.unobtrusive.js"></script>
</head>
<body>
<header class="header_bg clearfix">
<div class="container clearfix">
<div class="span2">
<div>
<ul class="social-links">
<li><a href="https://www.facebook.com/pages/Balkancar-Record-JSC/151365561578329?fref=ts" target="_blank">
<img src="/Content/images/facebook.png" alt="Facebook" /></a></li>
<li><a href="javascript:">
<img src="/Content/images/twitter.png" width="24" height="24" alt="Twitter" /></a></li>
</ul>
</div>
<div class="lang-switch">
<a href="#">English</a>
<ul>
<li>
<a href="/SetCulture/bg-BG?currentUrl=http%3A%2F%2Flocalhost%3A2487%2FAccount%2FLogin" id="bg-BG">Български</a>
</li>
<li>
<a href="/SetCulture/en-US?currentUrl=http%3A%2F%2Flocalhost%3A2487%2FAccount%2FLogin" id="en-US">English</a>
</li>
<li>
<a href="/SetCulture/ru-RU?currentUrl=http%3A%2F%2Flocalhost%3A2487%2FAccount%2FLogin" id="ru-RU">Руский</a>
</li>
</ul>
</div>
<section id="login">
<ul>
<li><a href="/Account/Register" id="registerLink">Register</a></li>
<li><a href="/Account/Login" id="loginLink">Log in</a></li>
</ul>
</section>
<div class="logo">
<a href="/">
<img src="/Content/themes/base/images/BalkancarLogo.png" alt="Balkancar Record Co"
title="Balkancar Record Co" />
</a>
</div>
<nav class="main-menu">
<ul>
<li><a href="/">Home</a></li>
<li><a href="/Home/About">About us</a>
<ul>
<li><a href="/Home/History">History</a></li>
</ul>
</li>
<li><a href="/Products/Products">Products</a>
<ul>
<li><a href="/Products/Forklifts">Forklifts</a></li>
<li><a href="/Products/Electro">Electro</a></li>
<li><a href="/Products/TowTractors">Tow tractors</a></li>
<li><a href="/Products/ElectricPlatforms">Electric platforms</a></li>
</ul>
</li>
<li><a href="/Home/Sertificates">Sertificates</a></li>
<li><a href="/Home/Announcements">Announcements</a></li>
<li><a href="/Home/Dealers">Dealers</a></li>
<li><a href="/Home/Contact">Contacts</a>
<ul>
<li><a href="/Home/RequestQuote">Request a quote</a></li>
<li><a href="/Home/Departments">Departments</a></li>
<li><a href="/Home/Map">Map</a></li>
</ul>
</li>
</ul>
</nav>
</div>
</div>
</header>
<div class="clear"></div>
<section class="container clearfix">
<header class="container page_info clearfix">
<h1 class="regular bottom_line">Log in.</h1>
<div class="clear"></div>
</header>
<div class="col_1_2">
<h2>Use a local account to log in.</h2>
<form action="/Account/Login" method="post">
<input name="__RequestVerificationToken" type="hidden" value="pCU9vwbREtMyY-pBCdJqeu-af1sZwVrX6-LEIfKvoZIHr59qkwp_voncWYJaWyaKUGGJCVWObvG85aG9mEMvn1kjRT2RnOpY-9mI4XzDtq81" /><div class="validation-summary-errors">
<ul>
<li>Wrong user name or password.</li>
</ul>
</div>
<fieldset>
<legend></legend>
<p>
<label for="UserName">User name</label>
<input data-val="true" data-val-required="The User name field is required." id="UserName" name="UserName" type="text" value="jhg" />
<span class="field-validation-valid" data-valmsg-for="UserName" data-valmsg-replace="true"></span>
</p>
<p>
<label for="Password">Password</label>
<input data-val="true" data-val-required="The Password field is required." id="Password" name="Password" type="password" />
<span class="field-validation-valid" data-valmsg-for="Password" data-valmsg-replace="true"></span>
</p>
<p>
<input data-val="true" data-val-required="The Remember me? field is required." id="RememberMe" name="RememberMe" type="checkbox" value="true" /><input name="RememberMe" type="hidden" value="false" />
<label class="checkbox" for="RememberMe">Remember me?</label>
</p>
<input type="submit" value="Log in" />
</fieldset>
<p>
<a href="/Account/Register">Register</a> if you don't have an account.
</p>
</form>
</div>
<div class="col_1_2 last">
<section class="social" id="socialLoginForm">
<h2>Use another service to log in.</h2>
<form action="/Account/ExternalLogin?ReturnUrl=" method="post">
<input name="__RequestVerificationToken" type="hidden" value="DRqkpbBT0xarOTdJjZ6NAOcZaPP9Xxx4_jOPeNhLFPGbOxxWEoxDx4NmN2lx4WxgZbYNe4VRBekPakyoXj6AmWKuW2XUV1yW5KC7QBpTMpQ1" />
<fieldset id="socialLoginList">
<legend>Log in using another service</legend>
<p>
<button type="submit" name="provider" value="google" title="Log in using your Google account">Google</button>
</p>
</fieldset>
</form>
</section>
</div>
</section>
<div class="clear padding10"></div>
<section class="homepage_widgets_bg clearfix">
<div class="container clearfix">
<div class="padding20"></div>
<div class="col_1_3">
<h1 class="regular white bottom_line">Contacts</h1>
<p id="contacts">
"Balkancar Record" Co<br />
17 ''Kuklensko Shosse'' str.<br />
4004 Plovdiv<br />
Phone: +359/32/ 69 50 50<br />
Fax: +359/32/ 69 27 53<br />
E-mail: <a href="mailto:record@balkancar-record.com">record@balkancar-record.com</a>
</p>
</div>
<div class="col_1_3">
<h1 class="regular white bottom_line">Follow us</h1>
<a href="https://www.facebook.com/pages/Balkancar-Record-JSC/151365561578329?ref=ts&fref=ts" target="_blank">
<img src="/Content/themes/base/images/facebook.png" alt="Facebook" />
</a>
<a href="http://www.youtube.com/user/BalkancarRecordJSC/videos" target="_blank">
<img src="/Content/themes/base/images/youtube.png" alt="YouTube" />
</a>
<script type="text/javascript">
window.___gcfg = {
lang: 'en-US'
};
(function () {
var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true;
po.src = 'https://apis.google.com/js/plusone.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s);
})();
</script>
<br />
</div>
<div class="col_1_3 last" id="why-section">
<h1 class="regular white bottom_line">Subscribe</h1>
{"Message":"Please fill in both fields!"}
</div>
<div class="padding80"></div>
</div>
</section>
<footer class="footer_bg_bottom clearfix">
<div class="footer_bottom container">
<div class="col_footer">
<div class="menu">
<ul>
<li><a href="/">Home</a></li>
<li><a href="/Home/About">About us</a></li>
<li><a href="/Products/Products">Products</a></li>
<li><a href="/Home/Sertificates">Sertificates</a></li>
<li><a href="/Home/Announcements">Announcements</a></li>
<li><a href="/Home/Dealers">Dealers</a></li>
<li><a href="/Home/Contact">Contacts</a></li>
</ul>
</div>
<div class="clear padding20"></div>
<p>© 2013 "Balkancar Record" Co</p>
<p>Build version: 1.0.1408.805</p>
</div>
<div class="clear padding20"></div>
</div>
</footer>
<script src="/Scripts/jquery.unobtrusive-ajax.js"></script>
<script src="/Scripts/jquery.validate.js"></script>
<script src="/Scripts/jquery.validate.unobtrusive.js"></script>
</body>
</html>