Can't start program without MS Visual Studio installed

Hello,

I'm new to QT Designer and programming. I've created a basic infobox with QT Designer, and compiled it in MS Visual Studio 2005. I can start the program from my computer, but if I try to start it from a computer without MS Visual Studio installed, it won't start. It says that there's something wrong with the program configuration.

Is there anything I should include in my code? Anyway, here's the code.

EDIT: And here's the header -file.

Thanks!

You have to distribute appropriate msvc libraries in together with the application. See Deploying an Application on Qt/Windows.