Well... Then try calling the "mouse_toggle" function instead:

Code:

---

function showPlslPan()
{
	plSelectionPan.pos_x = (screen_size.x - bmap_width(plSelectionPan.bmap)) / 2;
	plSelectionPan.pos_y = (screen_size.y - bmap_height(plSelectionPan.bmap)) / 2;
	plSelectionPan.visible = on;
	mouse_toggle();
}

---