help with script

[mccrazy5]

i tried to script something .. tell me please whats wrong with this script... when i start the map the game crash.
void OnStart()
{
AddEntityCollideCallback("Player", "bookarea", "bookscare", true, 1);

}
void bookscare(string &in asParent, string &in asChild, int alState)
{
AddPropForce("book1", 31, 1, -19.25, "world");
SetEntityActive("light1",true);
SetEntityActive("light2",true);
SetEntityActive("mb_window_1",false);
SetEntityActive("mb_window_noglass_1",true);
PlaySoundAtEntity("", "break_glass_large", "mb_window_noglass_1", 0, false);
}