Screensaver based on Qt and Opencv2.1 for WinXP

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WinXP

C

Windows

My screensaver run on Windows Vista and Windows Seven but not on Windows XP.
I'm try to understand why! When I test or apply the screensaver (by properties on Desktop) it's run, but when the system calls it, I see "Runtime error..." without error code.

About the screensaver:
- It's an exe file (screen.exe) renamed in screen.scr.
- The screen.exe file it's a simple C code based on project of Antonio Feijao Lock Windows Desktop[^]. It creates a new desktop and run on it an exe file (process.exe) with the CreateProcess() function.
- About the second one exe file (process.exe), it's a simple Qt dialog application that displays the video stream of the webcam.
- I'm using opencv 2.1 libraries and Qt 4.7.3 application framework.

I'm sorry for my bad English. Thanks to anyone who wants to help me to understand.