[Mouse] Cant set the position of the mouse

[starkmax]

Hi,
I'm having problems with a csfml function : sfMouse_setPositionRenderWindow();
I'm using the Csfml and I can't set the position of my cursor.
This function change the mouse position (but my cursor is not set at this position), and when I print the position of my mouse, my mouse's position has been set, but my cursor don't.
Need help please.