Need Help to build QwtPolar Library

Hi everyone

I have downloaded Qwt library and sucessfully built using qmake and nmake for MSVC from visual studio 2010 command prompt..I can also run the examples sucessfully.

Now i need to build QwtPolar library. i downloaded the latest build qwtpolar-1.0.1 from sourceforge and read the install file in the folder and followed the same procedure to build QwtPolar, but i am getting error like fatal error "cannot open include file:- 'qwt_curve_fitter.h": no such file or directory. followed by same error for different header file.

But i can see that all the header files are present in the Qwt folder and i have copied the Qwt.prf file to the makespec/features folder.

please help me to build the QwtPolar library.thanks in advance

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Added after 1 53 minutes:

Well Guys

At last i figured it out..i set the QMAKEFEATURES property of qmake to the installed features folder of the QWT and everything works fine now..
Just for guys who are stuck as like me,,,
You can query the path set to QMAKEFEATURES by using qmake -query QMAKEFEATURES and if it set properly than it should point to the QWTINSTALL/feature directory...