Qwt-6.0.0-rc1

[msr]

Hello,

I installed qwt library and all the examples are built without problems.
However when I create a project I can't use Qwt.

I tried:
export QMAKEFEATURES = /usr/local/qwt-6.0.0/features
qmake -set QMAKEFEATURES /usr/local/qwt-6.0.0/features

The qwt.prf file is in the specified directory.

But when Im building the project I still get the error:

/home/mribeiro/Qt_Projects/QwtTest/qwttest: error while loading shared libraries: libqwt.so.6: cannot open shared object file: No such file or directory
/home/mribeiro/Qt_Projects/QwtTest/qwttest exited with code 127

The contens of .pro file are:

TARGET = qwttest
 
SOURCES += main.cpp \
    mainwindow.cpp \
    plot.cpp \
    curvedata.cpp \
    signaldata.cpp
HEADERS += mainwindow.h \
    plot.h \
    curvedata.h \
    signaldata.h
 
CONFIG += qwt

TARGET = qwttest

SOURCES += main.cpp \
    mainwindow.cpp \
    plot.cpp \
    curvedata.cpp \
    signaldata.cpp
HEADERS += mainwindow.h \
    plot.h \
    curvedata.h \
    signaldata.h

CONFIG += qwt

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What am I doing wrong?

[Im using Ubuntu 10.04]