Ok i am getting a black screen problem! here is my code:

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

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fps_max=100;

VECTOR camera_rot;
ENTITY* picture;

wait(5);

camera.x = 0;
camera.y = -500;
camera.z = 0;

picture=ent_create( "untitled.bmp",vector(0,0,0) )

function main()
{
vec_set(camera_rot,picture.x);
vec_sub(camera_rot,camera.x);
vec_to_angle( camera.pan ,camera_rot);
wait(1);
}
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"Untitled.bmp" is a picture in the same directory as the script. The code in the func_main should make the camera point at the loaded sprite... but doesn't! Besides the shareware logos the screen is blank!