Hey, I have a bit of a problem. I made a script for a basic interface (not yet complete) yet when I run it, I get this error.

http://i6.photobucket.com/albums/y237/povraydude/error.jpg

Can someone please help me with this? This is my script so far.

Code:
#include <acknex.h>
#include <default.c>

function main() // Main function, includes screen resolution and color.

{
video_mode = 7;
screen_colour.blue = 150;
}

function quit game(); // The function that quits the game.

{
while (key_any) {wait(1);}
sys_exit (NULL);
}

//Panels and buttons.

PANEL* background =
{
bmap = "background.bmp";
pos_x = 0;
pos_y = 0;
layer = 1;
flags OVERLAY | VISIBLE
}