Error loading plugin dinamically

[Zero]

Well, I'm trying to loading the echoplugin, inculded in the Qt's 4.6.0 package from my application but i can't done it. I'm compiling on Windows with Visual Studio and VS Add-in, all projects works fine, and if i compile the Echoplugin example, it loads the plugin fine, but my application can't do it.

Here is the function:

Programa::Programa(QWidget *parent, Qt::WFlags flags) : QMainWindow(parent, flags)
{
     ui.setupUi(this);
     QDir pluginsDir(qApp->applicationDirPath());
     pluginsDir.cd("plugins");
     foreach (QString fileName,pluginsDir.entryList(QDir::Files))
     { 
          QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
          QObject *plugin = pluginLoader.instance();
 
          if (plugin)
          {
               QMessageBox::information(this,"xD","Plugin cargado!!! :D");
          }
          else
          {
               QMessageBox::information(this,"xD",pluginLoader.errorString());
          }
     }
 
     return;
}

Programa::Programa(QWidget *parent, Qt::WFlags flags) : QMainWindow(parent, flags)
{
     ui.setupUi(this);
     QDir pluginsDir(qApp->applicationDirPath());
     pluginsDir.cd("plugins");
     foreach (QString fileName,pluginsDir.entryList(QDir::Files))
     { 
          QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));
          QObject *plugin = pluginLoader.instance();

          if (plugin)
          {
               QMessageBox::information(this,"xD","Plugin cargado!!! :D");
          }
          else
          {
               QMessageBox::information(this,"xD",pluginLoader.errorString());
          }
     }

     return;
}

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QPluginLoader::instance() returns always null, and the QPluginLoader::errorString() returns "Unknown Error". I think that the code isn't the problem, so i suspect that error could be in the project configuration. ?

Thanks in advance

[wysota]

Make sure both your application and the plugin are built in the same mode (either debug or release).

[Zero]

Well, finally i solve it, the error was the compilation mode, i was compiling my application statically, and Qt don't suport making statically linked applications pluggeables.

Tahnks