[PyQt] Could not find mkspecs for your QMAKESPEC

[zb]

Hi 

I am new to PyQt and I a little disoriented. 

I would like to install Qwt in Pyqt so that I can draw a plot. This is my set up: 

Windows XP
python-3.1.1
Pyqt-Py3.1-gpl-4.6.2-2
MinGW-5.1.6
qt-win-opensource-4.2.3.mingw
Qwt 4.2.0


The PyQt examples work so I think the installation went OK. But when trying to install Qwt I get the following message:

qmake qwt.pro
Could not find mkspecs for your QMAKESPEC after trying:
E:\Qt\4.2.3\mkspecs

Any recomemdations or suggestions?

Thanks