Undefined method error in custom package even with proper import

Question

I edited the title of this thread to be a little more descriptive about the help I need.
The background: I have a multi-file Flash application that allows users to navigate through multiple pages (similar to a website). I realized yesterday that with each mouse click, I'm loading a page into memory, but not unloading it. After navigating through several pages, my memory really starts to take a hit. So, I want to define a custom package that loads each page and unloads the previous page.
I've gotten as far as defining the pageLoad function, but I keep getting an error that doesn't make sense to me (unless I'm importing the wrong flash packages).
When I test the Flash, I consistently get the following error:
dtutils.as – 1180: Call to a possibly undefined method addChild. – addChild(pageLoader);
Everything I have found indicates that to import the addChild method, I need to import flash.display.Sprite, which I'm doing, but I am still getting the error.
You'll have to forgive me as I'm not extremely familiar with objects or actionscript. I'm more of a hacker, but I grasp things quickly and can build on what I've already learned. This might be obvious to others, but I can't find anything that indicates that I'm doing anything wrong with my code, so any help you can give is greatly appreciated!!
My package code:
package com.clientname.demo
    import flash.display.Sprite;
    import flash.display.Loader;
    import flash.events.MouseEvent;
    import flash.net.URLRequest;
    public class dtutils
        //Properties
        public var pageLoader:Loader = new Loader();
        public var pagePath:URLRequest;
        //Constructor
        public function loadPage(url:String)
            pagePath = new URLRequest(url);
            pageLoader.load(pagePath);
            addChild(pageLoader);
I've also attempted to replace the four import lines in my package with the following 3 import lines, but I still get the same error message:
import flash.display.*;
import flash.events.*;
import flash.net.*;
The code I'm using to import my package and call the function in my flash file is:
import com.clientname.demo.dtutils;
dtutils.loadPage("../filepath/filename.swf");
I appreciate any help anyone can give me.

Answer 1

Thanks for the feedback. Being fairly new with actionscript (and an object approach, in general), and not being a real developer, I often struggle with naming conventions. Didn't even realize there was a specific convention for what is considered a utility and what isn't. However, I appreciate your feedback and will rename my package so that it isn't confusing to any other real developers that may need to do something with this code in the future.
Thanks!