[quote author="clochydd" date="1394294174"]Hello and welcome to devnet,
do you have a selected version in "Qt Versions" and a Kit selected under "Kits"?
[/quote]
Thank you for your reply.
After reading your post, I looked at the section of "QT Versions" and I saw this:
!http://oi57.tinypic.com/j82pli.jpg(QT Versions)!
So I googled "msvc 2012" and found out that I was needed the Visual Studio 2012.
Just installed it and it works! :)
Thank you again.