hello!

i'm just a noob in Qt programing and i can't figure this out:

i'm using Qt 4.4.3 integrated with Wascana version of Eclipse CDT under vista. i'm trying to add an external .lib to my project for handling a parallel port (inpout32). I edited my .pro like so:

TEMPLATE = app
TARGET = testLPT
QT += core gui
HEADERS += testlpt.h

LIBS += C:/libraries/inpout32.lib
INCLUDEPATH = C:/libraries

SOURCES = main.cpp \
testlpt.cpp

FORMS += testlpt.ui


when i try to compile the whole thing i get this:

debug/testlpt.o(.text+0x77a): In function `ZN7testLPT8OnOffLPTEv':
C:/Naukowe Bzdety/Wascana Workspaces/Workspace/testLPT/testlpt.cpp:32: undefined reference to `_Z18IsInpOutDriverOpenv@0'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [debug\testLPT.exe] Error 1
mingw32-make[1]: Leaving directory `C:/Naukowe Bzdety/Wascana Workspaces/Workspace/testLPT'
mingw32-make: *** [debug] Error 2

can anyone please tell me what is the problem here??