I have a little problem with "turn to me and look at me" in 3D

Code:

---

 
function turn_me(angle)
{
	angle = ang(angle - MY.PAN);
	if (angle > 10) {temp = my.speed;}
	else{
		if(angle < -10){temp = -my.speed;}
		else{temp = my.speed * angle * 0.1;}
		}
	c_rotate(me,vector(temp * time_step, temp * time_step, 0),ignore_passable | use_axisr | USE_AABB);

}

in NPC loop I've wrote this:
	vec_diff(temp,you.pos,my.pos);
	result = vec_to_angle(my_angle,temp);			
	turn_me(my_angle.PAN);
 

---

Problem is that NPC only change his pan not tilt to look at me.
I want to make something like this:
Code:

---

 
vec_set(temp,you.x);
vec_sub(temp,my.x);
vec_to_angle(my.pan, temp);
 

---

but with delay to make turning more smooth in 3D (pan and tilt).

Code:

---

var speed = 0.02;

action myEntity
{
   while (my != NULL)
   {
	if (key_space)   // start pan and tilt
	{
	   while(my.pan != youEntity.pan || my.tilt != youEntity.tilt)
	   {
  		vec_diff(temp,youEntity.x,my.x);
    		vec_to_angle(my.skill1,temp);
  		my.skill4 = ang(my.skill1 - my.pan);
  		my.skill5 = ang(my.skill2 - my.tilt);
  				  				
  		my.pan += speed * my.skill4 * time_step;
  		my.tilt += speed * my.skill5 * time_step;
  		wait(1);
	   }
        }
   }
		
   wait(1);
}

---

EDIT
----
Modified the while condition. Maybe split it into
two while-loop.

I've made it this way... and working
Code:

---

 
	vec_to_angle(temp_pan,vec_diff(temp,you.x,my.x));
	my.pan += ang(temp_pan.pan -my.pan)*0.2*time_step;
	my.tilt += ang(temp_pan.tilt -my.tilt)*0.2*time_step;
 

---

Ok, better add this line also:

my.roll += ang(temp_pan.roll-my.roll)*0.2*time_step;