When i use qmake in command line on my .pro file in Windows to make Makefile there is a problem with INCLUDEPATH i suppose.

I put qextserialport files(headers, lib and dll) in qextserialport folder and add path to INCLUDEPATH variable but it's show me error.
the output is:
Qt Code: 
  1. Ja@Ja-Komputer /h/Programowanie/Qt 4.7/prg011
  2. $ qmake
  3. WARNING: Failure to find: qextserialport_global.h
  4. WARNING: Failure to find: qextserialport.h
  5. WARNING: Failure to find: qextserialport_global.h
  6. WARNING: Failure to find: qextserialport.h
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and .pro file's excerpt
Qt Code: 
  1. TEMPLATE = app
  2.  
  3. QT += gui core
  4. INCLUDEPATH += $$quote(H:/Programowanie/Qt 4.7/prg011/qextserialport/)
  5. QMAKE_LIBDIR += $$quote(H:/Programowanie/Qt 4.7/prg011/qextserialport/)
  6.  
  7. CONFIG(debug, debug|release) {
  8.   LIBS += -lqextserialportd
  9. } else {
  10.   LIBS += -lqextserialport
  11. }
  12. win32:LIBS += -lsetupapi
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