Bullets is flying only on x axis

Hello all, currently I have an instantiatyed bullet that is created as such:

Code (csharp):

1.  
2. GameObject bullet = (GameObject)Instantiate (Bullets, point, NormalCamera.gameObject.transform.rotation );
3. bullet.transform.forward = NormalCamera.transform.forward;
4.  

This issue is that when I instantiate the bullet the bullet is firing at correct angle/direction.
However, I store a bunch of data in a Vector Array that alters the flight of the bullet.The vector array takes control of the bullet immediately (which is what I want) What math would I use to ensure that bullet continues to fly in its instantiated direction but updates with my vector array data? Currently the bullet only flys on the x axis?

Code (csharp):

1.  
2. void CreateVectorArray (int x)
3.     {
4.         positions = new Vector3[x];
5.  
6.         positions[0] = this.gameObject.transform.position;
7.  
8.         for(int i = 1; i < x-1; i++)
9.         {
10.             positions[i].x = positions[i-1].x + (float)ptr[0,i] - (float)ptr[0,i-1];//yards
11.             positions[i].y = positions[i-1].y + ((float)ptr[10,i] + (float)ptr[10,i-1])*0.0277778f;//inches
12.             positions[i].z = positions[i-1].z + ((float)ptr[ 4,i] + (float)ptr[ 4,i-1])*0.0277778f;//inches
13.  
14.         }
15. }
16.  

 

Crickets?