how to use qt4.8.4 in QtCreator 2.7 with alredy installed Qt5.0.2

I have been using qt5 without any problem. Now i need use the qt4 for a project and i can’t compile. I followed the tutorial to add a new QT version to QTcreator and seems no errors, However, when compile a hello world with qt4.8 i find some errrors related with Mingw. I haven’t installed a new version of Mingw, i’ve only linked the compiler of qt5. The Debugger is also the same of qt5. I’m under Windows XP, but the problem seems the Mingw. This is the configuration: http://www.subirimagenes.com/imagen-dibujo-8500726.html(Conf Kits) This is the errors: http://www.subirimagenes.com/imagen-errores-8500731.html(Errors)