[mapguide-users] Devguide sample buffer Error

[padmini godavarthi]

Hi,
iam creating buffer in php by looking at the devguide application . i
followed the same process as
from index.php i called task pane in analyzing_features folder. ad then 
createbuffer.php

but i when calling createbuffer.php i got nothing  means

in createbuffer.php

 <?php
    include '../common/common.php';

    $args = ($_SERVER['REQUEST_METHOD'] == "POST") ? $_POST : $_GET;
    $sessionId = $args['SESSION'];
    $mapName = $args['MAPNAME'];
    $mapName = ($_SERVER['REQUEST_METHOD'] == "POST")? $_POST['MAPNAME']:
$_GET['MAPNAME'];

    try
    {
      // Initialize the Web Extensions and connect to the Server using
      // the Web Extensions session identifier stored in PHP session state.

      MgInitializeWebTier ($webconfigFilePath);

      $userInfo = new MgUserInformation($sessionId);
      $siteConnection = new MgSiteConnection();
      $siteConnection->Open($userInfo);

      $resourceService =
$siteConnection->CreateService(MgServiceType::ResourceService);
      $featureService =
$siteConnection->CreateService(MgServiceType::FeatureService);
      $queryOptions = new MgFeatureQueryOptions();

      $map = new MgMap();
      $map->Open($resourceService, $mapName);

      // Check for selection data passed via HTTP POST

      if (isset($_POST['SELECTION']) && $_POST['SELECTION'] != '')
      {
        $selection = new MgSelection($map, $_POST['SELECTION']);
        $selectedLayers = $selection->GetLayers();
      }

i deleted  include '../common/common.php'; and replaced with include
'utilityfunctions.php' only 
but it displays nothing in map and the page is just emplty...............

can any boby plz tell me what is my mistake??????????????????????

Regards,
padmini G.
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