qt 3.3.6 + qwt-5.0.2 + WinXP + MSVisualStudio 6.0

[Times]

Hello!

I'm using qt 3.3.6 (winXP and C++ Visual Studio 6.0) and I'd like to install qwt-5.0.2
I've read http://qwt.sourceforge.net/qwtinstall.html for my case it says:
----------
B) Win32/MSVC Qt3/Qt4
=====================
Please read the qmake documentation how to convert
your *.pro files into your development environment.

F.e MSVC with nmake:
qmake qwt.pro
nmake
----------

But I've got the following error while doing nmake:
---------------------------------
[...]

.\qwt_panner.cpp(53) : error C2666: '[]' : 2 overloads have similar conversions
.\qwt_panner.cpp(374) : error C2374: 'i' : redefinition; multiple initialization

.\qwt_panner.cpp(368) : see declaration of 'i'

[...]

Generating Code...
NMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files\Microsoft Visual Studio\VC98\bin\N
MAKE.EXE"' : return code '0x2'
Stop.
----------------------------------

Maybe I forgot something..
can somebody help me out?..

Thanks a lot!!