Two database connections with different drivers at the same time?

[goofacz]

Hello!
I try to establish two database connections, one with PostgreSQL and second with SQLite. I start with code:

QSqlDatabase mainDatabase = QSqlDatabase::addDatabase("QPSQL", "MainDatabase");
QSqlDatabase mapDatabase = QSqlDatabase::addDatabase("QSQLITE", "MapDatabase");

QSqlDatabase mainDatabase = QSqlDatabase::addDatabase("QPSQL", "MainDatabase");
QSqlDatabase mapDatabase = QSqlDatabase::addDatabase("QSQLITE", "MapDatabase");

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then I setup and test connection with PostgreSQL – everything its fine so far. When I try to open SQLite databse with code:

mapDatabase.setDatabaseName("db_name");
if (!this->mapTilesDatabase.open())
{
     // error handling
}

mapDatabase.setDatabaseName("db_name");
if (!this->mapTilesDatabase.open())
{
     // error handling
}

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I recieve error: Driver not loaded.
Is it possible to use two different database divers simultaneously at all?