Qt in windows and mysql !!!

[probine]

I am having trouble connecting from Qt (Windows) to my database.

I am using MySQL and the server is running. With some GUI clients I am connecting to the database, but when I try to connect from Qt, I just cannot.

I have included "#include <QtSql>" in my .cpp

QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
     db.setHostName("localhost");
     db.setDatabaseName("testdata");
     db.setUserName("test");
     db.setPassword("password");
     bool ok = db.open();
     if(ok)
      textBrowser->append("Conection to DATABASE");
    else
      textBrowser->append("error to DATABASE");

QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
     db.setHostName("localhost");
     db.setDatabaseName("testdata");
     db.setUserName("test");
     db.setPassword("password");
     bool ok = db.open();
     if(ok)
      textBrowser->append("Conection to DATABASE");
    else
      textBrowser->append("error to DATABASE");

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I have also included "QT += sql" to my .pro

I can compile and run the code perfectly, there is no errors in it. But, but I guess that there is no connection, because I always end up printing the "error to Database" message on the screen.


Help please ?