Simple Trigger question C#

I have an environment where, when a user approaches a specific object, a UI "fades in" above it. The trigger is working, and I can get the text header to fade in, but getting the entire UI panel (including the buttons contained within it) to fade in has me stumped.
I've looked at a myriad of tutorials, Youtube videos, forum posts, etc., but cannot seem to find the missing component. I'm certain it's something simple, but I'm not an engineer and don't write code, so this is all new to me.
Can one of you expert-type guys look at my code and tell me what I'm missing? This is where I'm at so far:

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class fadeEffects : MonoBehaviour {

public Text headerText;
public float fadeSpeed = 5f;
public bool entrance;
public GameObject Canvas;

void Awake ()
{
headerText = Canvas.GetComponentInChildren<Text> ();
headerText.color = Color.clear;

}

void Update ()
{
ColorChange();
}

void OnTriggerEnter (Collider col)
{
if (col.gameObject.tag == "Player")
{
entrance = true;
}

}

void OnTriggerExit (Collider col)
{
if (col.gameObject.tag == "Player")
{
entrance = false;

}

}

void ColorChange ()
{

if (entrance)
{
headerText.color = Color.Lerp (headerText.color, Color.white, fadeSpeed * Time.deltaTime);

}

if (!entrance)
{
headerText.color = Color.Lerp (headerText.color, Color.clear, fadeSpeed * Time.deltaTime);
}

}
}

 

also http://forum.unity3d.com/threads/using-code-tags-properly.143875/

 

Thanks, guys! I appreciate your feedback!

 

I'd like to add that if you use the CrossFadeAlpha() function on a CanvasGroup, it will only work if your alpha value is non-zero. So if you want to fade from transparent to opaque, you'll want to set your alpha to something very small first.

 

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