Running the project in different QT Creator verison

[thomas11live.com.sg]

Dear All,
I created a project in QT Creator 2.2.1.
Now I changed to a new machine and the machine has QT Creator 2.4.1.
When I build the error is
Error while building project RobotEyes (target: Desktop)
When executing build step 'qmake'

How can I fix the error?
Thanks,

[sierdzio]

Is Qt installed and the toolchain properly set up? Have you by any chance copied the project from the old machine together with the .pro.user file (if you, then you should remove that file and reopen the project in Qt Creator)?

[thomas11live.com.sg]

Thanks, it works.