I get an invalidcast excpetion error here and I can't figure out why. I have a transform variable, and a transform array. I populate the array when it wakes up but when I try to assign the variable to one of the transforms in the array I get an invalidcastexception error. anyone know why?

var respawnpoint : Transform;
var respawnpoints = new Array (Transform);

function Awake()
{
    //GET A LIST OF ALL SPAWN POINTS AND PUT THEM IN respawnpoints ARRAY.
    respawnpoints.push(gameObject.Find("SpawnPoint1").transform);

}
function chooseSpawn()
{
    for(i=0;i<respawnpoints.length;i++)
    {
        //deternmine which spawn point is best. 
        respawnpoint = respawnpoints[i];
    }