Making Credits Scroll Upwards on Screen

Hello, I'm trying to make very simple credits for my game, and I was thinking about just making a GUIText prefab (creditTextItem), and then read items in from my credits text file, instantiate a new GUIText prefab set its position to off-screen add it to a list of GUIText prefabs, then each update cycle through the list update the position in the y axis a little bit. My code is below.

using UnityEngine;
using System.Collections;
using System.IO;
using System.Collections.Generic;

public class CreditsScript : MonoBehaviour 
{
    public GUIText creditTextItem;
    private List<GUIText> Credits = new List<GUIText>();
    private TextReader tr;
    public string path;
    private List<string> credits = new List<string>();

    // Use this for initialization
    void Start () 
    {
        // Set the path for the credits.txt file
        path = "Assets/Resources/Credits.txt";

        // Create reader & open file
        tr = new StreamReader(path);

        string temp;
        while((temp = tr.ReadLine()) != null)
        {
            // Read a line of text
            credits.Add(temp);
        }

        // Close the stream
        tr.Close();

        CreateCredits();
    }

    // Update is called once per frame
    void Update () 
    {
        if (Credits.Count > 0)
        {
            for (int i = 0; i < Credits.Count; i++)
            {
                Credits[i].transform.Translate(new Vector3(0f, 1f, 0f));
            }
        }
    }

    void CreateCredits()
    {
        for (int i = 0; i < credits.Count; i++)
        {
            string c = credits[i];
            Instantiate(creditTextItem);
            creditTextItem.transform.position = GameObject.Find("CreditStart").transform.position;
            creditTextItem.text = c;
            Debug.Log(c);
            Credits.Add(creditTextItem);
         }
     }
 }

It's reading in the text file properly and updating the list's correctly. But is isn't displaying the items on screen any ideas?

Thanks, Hans