Problems connecting to oracle database

[txikiting]

Hi all,
I'm creating a simple program to connect to oracle and execute a query, but I have this error:

/usr/include/qt4/QtSql/qsql_oci.h:47: error: QtSql/private/qsqlcachedresult_p.h: No such file or directory

Please, can I help me?

This is my code:

void MainWindow::on_pushButton_clicked(){
ui->lineEdit->setText("CONNECTING TO ORACLE...");
QSqlDatabase db = QSqlDatabase::addDatabase("sgbdr");
db.setHostName("casa");
db.setDatabaseName("forestalmarti");
db.setUserName("USER");
db.setPassword("PASSW");
if (!db.open()) {
QMessageBox::critical(0, QObject::tr("Database Error"),
db.lastError().text());
}
}

I'm developing with Qt 4.6.2, on Ubuntu 10.04 LTS.

Thank you!!

[vsorokin]

I think, no OCI drivers enough in your Qt-build. You must download Qt-source and build it with needed driver.