after a long wait NCreport release a compatible version for Qt 5.1.1 minGW

every thing work perfectyl but after implementation my programme can’t start

her is my code .pro file
Qt Code: 
  1. #-------------------------------------------------
  2.     #
  3.     # Project created by QtCreator 2013-09-17T18:17:24
  4.     #
  5.     #-------------------------------------------------
  6.  
  7.     QT       += core gui sql xml printsupport
  8.  
  9.     greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  10.  
  11.     TARGET = testncreport
  12.     TEMPLATE = app
  13.  
  14.     INCLUDEPATH += "E:\apprendreQt\gestionstock6\includes\include"
  15.  
  16.     SOURCES += main.cpp\
  17.             mainwindow.cpp
  18.  
  19.     HEADERS  += mainwindow.h
  20.  
  21.     FORMS    += mainwindow.ui
  22.  
  23.  
  24.     LIBS += "-LE:\apprendreQt\gestionstock6\includes\lib -lNCReport2"
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her is the mainwindow.cpp
Qt Code: 
  1. #include "mainwindow.h"
  2.     #include "ui_mainwindow.h"
  3.     #include "ncreport.h"
  4.     #include "ncreportpreviewoutput.h"
  5.     #include "ncreportoutput.h"
  6.     #include "ncreportpreviewwindow.h"
  7.  
  8.     MainWindow::MainWindow(QWidget *parent) :
  9.         QMainWindow(parent),
  10.         ui(new Ui::MainWindow)
  11.     {
  12.         ui->setupUi(this);
  13.  
  14.         NCReport *report = new NCReport(this);
  15.         report->reset(true);
  16.         report->setReportFile("E:\apprendreQt\gestionstock6\includes\reports\test.xml");
  17.         report->runReportToPrinter();
  18.  
  19.     }
  20.  
  21.     MainWindow::~MainWindow()
  22.     {
  23.         delete ui;
  24.     }
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after compiling i get this error
C:\test\testncreport\mainwindow.cpp:14: error: undefined reference to `_imp___ZN8NCReportC1EP7QObject'
C:\test\testncreport\mainwindow.cpp:15: error: undefined reference to `_imp___ZN8NCReport5resetEb'
C:\test\testncreport\mainwindow.cpp:15: error: undefined reference to `_imp___ZN8NCReport5resetEb'
C:\test\testncreport\mainwindow.cpp:17: error: undefined reference to `_imp___ZN8NCReport18runReportToPrinterEibP7QWidge tRK7QString'
collect2.exe:-1: error: error: ld returned 1 exit status