hm... this works for me (after i have removed the (long)):
Code:

---

void test_remove()
{
	wait(-3);
	NewtonDestroyBody(nworld, (NewtonBody*)my->skill99);
	ent_remove(my);
}

void fireentity()
{
	var power = 0;
	while(mouse_left) // power depends on how long you hold the mouse button
	{
		power = clamp(power + time_step, 0, 25);
		draw_line(vector(10, 40, 0), 0, 100);
		draw_line(vector(10, 40, 0), vector(255,255,255), 100);
		draw_line(vector(10 + power * 5, 40, 0), vector(255,255,255), 100);
		wait(1);	
	}
	
	VECTOR v;
	vec_set(&v, vector(100, 0, 0));
	vec_rotate(&v, &camera->pan);
	vec_add(&v, &camera->x);
	
	switch(currentcollisiontype)
	{
		case NEWTON_SPHERE:
			you = ent_create("ball.mdl", &v, test_remove);
			break;
		case NEWTON_BOX:
			you = ent_create("crate.mdl", &v, NULL);
			break;
[...]

---

i use the newest free lite-c version.

btw. you can download a cleaned up version of my newton example here.