Configuring of Qt5 on Kubuntu 13.04

Hi guys.

How do I configure qt5 on Kubuntu 13.04?

I've installed all dev packages from repository.
I also configured on QtCreator's menu Tools > Build & Run > Qt Versions.

I can compile an app using Qt5, but when I try to run it consumes 2gb of memory and doesnt show the main window...

Any body have any idea?

Can you go deeper into details please. Which program are you exactly running? what does your program do? what is the size of your memory? what is the size of your SWAP space?