What is wrong with this?

var bullitPrefab : Transform;
var force : int;

function Update () {

if(Input.GetButton("Fire1"))
{
	var bullit = Instantiate(bullitPrefab, GameObject.Find("spawnPoint").transform.position, Quaternion.identity);
	bullit.rigidbody.AddForce(transform.forward * force);
	
}

}

My bullet just go to the left! WHATS WRONG???

There is nothing wrong with it, it is doing excatly what you are telling it to do. The reason being is properly that your charcters face is not facing in the local Z direction. To solve it you can try to use transform.right or -transform.right(notice the minus).