使用ant build 无法undeploy，返回了页面的html代码

 remove  target 的 代码
 <target name="remove"
   description="Remove application on servlet container">    <undeploy url="${manager.url}"
         username="${manager.username}"
         password="${manager.password}"
             path="${app.path}"/>  </target>错误返回：
remove:
 [undeploy] <html>
 [undeploy] <head>
 [undeploy] <style>
 [undeploy] H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}  table {
 [ [undeploy] <tr>
 [undeploy] <td colspan="2" class="header-left"><small>Deploy directory or WAR file located on server</small></td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td colspan="2">
 [undeploy] <form method="get" action="/manager/html/deploy">
 [undeploy] <table cellspacing="0" cellpadding="3">
 [undeploy] <tr>
 [undeploy] <td class="row-right">
 [undeploy] <small>Context Path (optional):</small>
 [undeploy] </td>
 [undeploy] <td class="row-left">
 [undeploy] <input type="text" name="deployPath" size="20">
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td class="row-right">
 [undeploy] <small>XML Configuration file URL:</small>
 [undeploy] </td>
 [undeploy] <td class="row-left">
 [undeploy] <input type="text" name="deployConfig" size="20">
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td class="row-right">
 [undeploy] <small>WAR or Directory URL:</small>
 [undeploy] </td>
 [undeploy] <td class="row-left">
 [undeploy] <input type="text" name="deployWar" size="40">
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td class="row-right">
 [undeploy] &nbsp;
 [undeploy] </td>
 [undeploy] <td class="row-left">
 [undeploy] <input type="submit" value="Deploy">
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] </table>
 [undeploy] </form>
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td colspan="2" class="header-left"><small>WAR file to deploy</small></td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td colspan="2">
 [undeploy] <form action="/manager/html/upload" method="post" enctype="multipart/form-data">
 [undeploy] <table cellspacing="0" cellpadding="3">
 [undeploy] <tr>
 [undeploy] <td class="row-right">
 [undeploy] <small>Select WAR file to upload</small>
 [undeploy] </td>
 [undeploy] <td class="row-left">
 [undeploy] <input type="file" name="deployWar" size="40">
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td class="row-right">
 [undeploy] &nbsp;
 [undeploy] </td>
 [undeploy] <td class="row-left">
 [undeploy] <input type="submit" value="Deploy">
 [undeploy] </td>
 [undeploy] </tr>
 [undeploy] </table>
 [undeploy] </form>
 [undeploy] </table>
 [undeploy] <br>
 [undeploy] <table border="1" cellspacing="0" cellpadding="3">
 [undeploy] <tr>
 [undeploy] <td colspan="6" class="title">Server Information</td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td class="header-center"><small>Tomcat Version</small></td>
 [undeploy] <td class="header-center"><small>JVM Version</small></td>
 [undeploy] <td class="header-center"><small>JVM Vendor</small></td>
 [undeploy] <td class="header-center"><small>OS Name</small></td>
 [undeploy] <td class="header-center"><small>OS Version</small></td>
 [undeploy] <td class="header-center"><small>OS Architecture</small></td>
 [undeploy] </tr>
 [undeploy] <tr>
 [undeploy] <td class="row-center"><small>Apache Tomcat/5.5.27</small></td>
 [undeploy] <td class="row-center"><small>1.6.0_10-rc2-b32</small></td>
 [undeploy] <td class="row-center"><small>Sun Microsystems Inc.</small></td>
 [undeploy] <td class="row-center"><small>Windows XP</small></td>
 [undeploy] <td class="row-center"><small>5.1</small></td>
 [undeploy] <td class="row-center"><small>x86</small></td>
 [undeploy] </tr>
 [undeploy] </table>
 [undeploy] <br>
 [undeploy] <hr size="1" noshade="noshade">
 [undeploy] <center><font size="-1" color="#525D76">
 [undeploy] <em>Copyright &copy; 1999-2005, Apache Software Foundation</em></font></center>
 [undeploy] </body>
 [undeploy] </html>