Character Re-spawn Problem

I have a Script:

private var StartPos : Vector3;
function Awake()
{
    StartPos = transform.position;
}
function OnTriggerEnter(other : Collider)
{
    if(other.gameObject.name == "fallout")
    {
        //print("die! Respawn to:"+StartPos);
        transform.position = StartPos;
    }
}

And My Character (a bullet has a constant force to move it) and when i hit the obstacle my Bullet re-spawns, but it doesn't re-pawn stopped. It keeps going after respawn.

How can i fix this problem?

All help is appreciated

Thanks