Can't support qt webkit in maya2012?

[tuyu]

as titile saying, i 'm going to wrote a qt plugin in maya2012 which a widget can embed web browse, but it don't working!

maya'saying // Error: Unable to dynamically load : D:/test_mll/test_web/release/test_web.mll

but when i  replacing QLabel to QWebView widget in code, and the plugin is success in working.

need somehelp!

here is my code:-------------------------------------

#include "test_web.h"
#include
#include
#include

QPointer test_web::web;
const MString      test_web::commandName("test_web");

MStatus test_web::doIt( const MArgList& )
//
//  函数描述：
//           网络核心的测试函数。
{
 if( web.isNull() ) {
  web = new QMainWindow();

  //QLabel *label = new QLabel("this is my label!");
  //web->setCentralWidget( label );

  QWebView *webView = new QWebView();
  webView->load(QUrl("http://www.sohu.com"));
  web->setCentralWidget( webView );
  web->show();
 }
 else
 {
  web->showNormal();
  web->raise();
 }

 //MGlobal::displayInfo(MString("here is ok!"));

 return MS::kSuccess;
}

void test_web::cleanup()
//
//  函数描述：
//           清除插件的残余。
//
{
 if( !web.isNull() ) delete web;
}

// ==========================================================================
//
//   Plugin load/unload
//
// ==========================================================================

MStatus initializePlugin(MObject plugin)
{
 MStatus  st;
 MFnPlugin pluginFn(plugin, "Autodesk, Inc.", "1.0", "Any", &st);

 if (!st) {
  MGlobal::displayError(
   MString("test_web - could not initialize plugin: ")
   + st.errorString()
  );
  return st;
 }

 // Register the command.
 st = pluginFn.registerCommand(test_web::commandName, test_web::creator);

 if (!st) {
  MGlobal::displayError(
   MString("test_web - could not register '")
   + test_web::commandName + "' command: "
   + st.errorString()
  );
  return st;
 }

 return st;
}

MStatus uninitializePlugin(MObject plugin)
{
 MStatus  st;
 MFnPlugin pluginFn(plugin, "Autodesk, Inc.", "1.0", "Any", &st);

 if (!st) {
  MGlobal::displayError(
   MString("test_web - could not uninitialize plugin: ")
   + st.errorString()
  );
  return st;
 }

 // Make sure that there is no UI left hanging around.
 test_web::cleanup();

 // Deregister the command.
 st = pluginFn.deregisterCommand(test_web::commandName);

 if (!st) {
  MGlobal::displayError(
   MString("test_web - could not deregister '")
   + test_web::commandName + "' command: "
   + st.errorString()
  );
  return st;
 }

 return st;
}