PHP - FTP 文件上传错误

我正在向我的网站添加FTP上传，并在实时测试时不断收到此错误。该脚本在我的本地主机上完全有效。

什么可能会在我的网络主机的服务器上阻止它？

警告：ftp_login（） 期望参数 1 是资源，给定布尔值 在/home/content/20/8630520/html/filedrop.php 第 134 行

    <div id="form">
    <?
    if(!isset($_POST["submit"])){?>
    <form action="filedrop.php" method="POST" enctype="multipart/form-data">
    <fieldset>
        <label><span class="error">*</span> Server:</label> 
        <input size="50" type="text" name="server" value=""/>
        <label><span class="error">*</span> Username:</label> 
        <input size="50" type="text" name="user"  value=""/>
        <label><span class="error">*</span> Password:</label> 
        <input size="50" type="password" name="password" value=""/>
        <label><span class="error">*</span> Select File:</label> 
        <input name="userfile" type="file" size="50" style="height:23px;"/>
        <input type="submit" name="submit" value="Upload" />
    </fieldset>
    </form>
    <?}
    else 
    {
    set_time_limit(300);//for uploading big files
    $paths=$_POST['pathserver'];
    $filep=$_FILES['userfile']['tmp_name'];
    $ftp_server=$_POST['server'];
    $ftp_user_name=$_POST['user'];
    $ftp_user_pass=$_POST['password'];
    $name=$_FILES['userfile']['name'];

    // set up a connection to ftp server
    $conn_id = ftp_connect($ftp_server);
    // login with username and password
    $login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);
    // check connection and login result
    if ((!$conn_id) || (!$login_result)) {
    echo "1.) FTP connection has encountered an error!</br>";
    echo "2.) Attempted to connect to $ftp_server for user $ftp_user_name....</br>";
    echo "Go <a href='"filedrop.php'">back</a> and try again.";
    exit;
    } else {
    echo "1.) Connected to $ftp_server, for user $ftp_user_name".".....</br>";
    }
    // upload the file to the path specified
    $upload = ftp_put($conn_id, $paths.'/'.$name, $filep, FTP_BINARY);
    // check the upload status
    if (!$upload) {
    echo "2.) FTP upload has encountered an error!</br>";
    echo "Go <a href='"filedrop.php'">back</a> and try again.";
    } else {
    echo "2.) Uploaded file with name $name to $ftp_server ";
    echo "Go <a href='"filedrop.php'">back</a> to upload more.";
    }
    // close the FTP connection
    ftp_close($conn_id);    
    }
    ?>
</div>

我需要修改它吗？还是添加另一个文件？我不完全是PHP高级。

谢谢

赛斯