qmake.exe exited with code 2 with Qt Creator

I have Downloaded Qt 4.7.1 and Qt Creator.
In Qt Creator I can run example programs.
I have Created new project - Qt empty project and added new cpp-file with code example. When I press "Run", "Build" or "Rebuild" I've got this output

01:40:20: Running steps for project First... 01:41:24: Starting: "D:\Qt\4.7.1\bin\qmake.exe"

How to rectify this..