undefined reference to `_imp___Z*****

[mgrzyma]

Qt 4.2.2 with MinGW 3.4.2 (make is GNU 3.8) on XPpro SP2:
I'm trying a simple program that would connect through ODBC to my MSSQL200 server that runs on my machine;
the C:\Qt\4.2.2\demos\sqlbrowser\release\sqlbrowser.ex e does it perfectly but i want to do my own;

qmake -project and qmake -o Makefile -SQLTest.pro run Ok but after that the "make" first tells me: QtSql - no such file or directory and then after I insert in the Makefile.Debug the "-I"C:/Qt/4.2.2/include/QtSql" it returns a bunch of:

"undefined reference to `_imp___Z*****QSqlDatabase'"

here is my 2 source files:
main.cpp:

#include <QtGui>
#include <QtSql>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlError>
 
#include "connection.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    if (!createConnection()) { 
	return 1;}
    return app.exec();
}

#include <QtGui>
#include <QtSql>
#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlError>

#include "connection.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    if (!createConnection()) { 
	return 1;}
    return app.exec();
}

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and connection.h:

#ifndef CONNECTION_H
#define CONNECTION_H
 
#include <QMessageBox>
#include <QSqlDatabase>
 
inline bool createConnection()
{
 
    QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
    db.setHostName("localhost");
    db.setDatabaseName("mydb");
    db.setUserName("sa");
    db.setPassword("password");
 
    if (!db.open()) {
        QMessageBox::warning(0, QObject::tr("Database Connection Error"),
                             db.lastError().text());
        return false;
    }
    return true;
}
#endif

#ifndef CONNECTION_H
#define CONNECTION_H

#include <QMessageBox>
#include <QSqlDatabase>

inline bool createConnection()
{
   
    QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
    db.setHostName("localhost");
    db.setDatabaseName("mydb");
    db.setUserName("sa");
    db.setPassword("password");

    if (!db.open()) {
        QMessageBox::warning(0, QObject::tr("Database Connection Error"),
                             db.lastError().text());
        return false;
    }
    return true;
}
#endif

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make gives me exact same message even if i try to copy the entire contents of C:\Qt\4.2.2\demos\sqlbrowser\ into a different directory (how did it copile at install to begin with??)
my path is: "PATH=C:\Qt\4.2.2\bin;C:\Qt\4.2.2\lib;C:\Qt\4.2.2\ include;C:\MinGW\bin;C:\WINDOWS\System32"

any ideas?