Can anyone tell me what's wrong with this script?

////////////////////////////////////////////////////////////////////
#include <acknex.h>
#include <default.c>

////////////////////////////////////////////////////////////////////
var speed = 50;

BMAP* mouse_pcx = "mouse.pcx"; // bitmap used for the mouse pointer

////////////////////////////////////////////////////////////////////

function main()
{
video_mode = 7;
screen_color.blue = 150;
mouse_map = mouse_pcx;
mouse_mode = 4;
}

//////////////////////////////////////////////////////////////////////

PANEL* main_pan =
{
bmap = "main2.pcx";
pos_x = 250;
pos_y = 200;
vslider (16, 71, 90, "slider.pcx", 0, 100, speed);
digits (15, 50, 3, *, 1, speed);
flags = OVERLAY | VISIBLE;
}

//////////////////////////////////////////////////////////////////////

This script came with the lite-c tutorial, so it should work. But I can't even see my mouse. Let alone use the slider.