Qt 访问 MS Access 数据库 open error!

[fetionone]

Ubuntu 9.10
qtsdk-2010.02

访问 MS Access 数据库
代码：

#include <QtCore/QCoreApplication>
#include <QtSql>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QSqlDatabase dbAc = QSqlDatabase::addDatabase("QODBC");
    qDebug() << "ODBC driver valid?" << dbAc.isValid();

   dbAc.setDatabaseName(QString("DRIVER={Microsoft Access Driver (*.mdb)};FIL={MS Access};DBQ=Files.mdb;UID=;PWD="));

    qDebug()<<dbAc.databaseName();

       if ( !dbAc.open("",""))
       { qDebug()<<"DB open error!"; }
       else
       { qDebug()<<"DB open Sucess!"; }


    return a.exec();
}

数据库打不开：

运行结果：
ODBC driver valid? true
"DRIVER={Microsoft Access Driver (*.mdb)};FIL={MS Access};DBQ=Files.mdb;UID=;PWD="
DB open error!

请问这是什么原因啊？？？

多谢了

[dext]

#include <qapplication.h>
#include <qsqldatabase.h>
#include <qsqlquery.h>
 
#define DB_NaSCoM_DRIVER     "QODBC3"
#define DB_NaSCoM_DBNAME     "manoj"
#define DB_NaSCoM_USER       "scicom"
#define DB_NaSCoM_PASSWD     ""
#define DB_NaSCoM_HOST       "hpstryker"
 
int main( int argc, char *argv[] )
{
    QApplication app ( argc, argv, FALSE );
 
    QSqlDatabase *defaultDB = QSqlDatabase::addDatabase(
DB_NaSCoM_DRIVER );
    defaultDB->setDatabaseName( DB_NaSCoM_DBNAME );
    defaultDB->setUserName( DB_NaSCoM_USER );
    defaultDB->setPassword( DB_NaSCoM_PASSWD );
    defaultDB->setHostName( DB_NaSCoM_HOST );
 
    if ( defaultDB->open() )  {
             // Database successfully opened; we can now issue SQL
commands.
QSqlQuery query(QString::null, defaultDB);
            query.exec ("SELECT * FROM igifile");           
            if ( query.isActive()) {
                While (query.next ()) {
                    qDebug (query.value (1).toString() + ": " +
                            query.value (2).toString ());
                }
            }                          
            }    
            return 0;
}