AS3 Errors: 1046: & 1180: Importing custom class into mc on second frame?

Question

Pulling my hair out here trying to solve this one. I have no experience with classes...I code everybit of AS3 into the frames usually. I was trying a custom class out and it just isn't working well.

I have a movieclip called mc_info_panel that I have placed onto my stage in frame one of my main timeline. One frame one of mc_info_panel i have the following AS3 code: stop(); on frame 2 of mc_info_panel I am trying to import my custom class:

import com.displayObj.ImgViewer;

Here are my errors codes:

//-----first error code-----
1046: Type was not found or was not a compile-time constant:ImageContainer.
this error's location & source:
Symbol 'mc_info_panel', Layer 'Layer 2', Frame 2, Line 35
var imageContainer:ImageContainer;

//-----second error code-----
1046: Type was not found or was not a compile-time constant:ImageContainer.
this error's location & source:
Symbol 'mc_info_panel', Layer 'Layer 2', Frame 2, Line 287
var imgContainer:ImageContainer=new ImageContainer();

//-----third error code-----
1180: Call to a possibly undefined method ImageContainer.
this error's location & source:
Symbol 'mc_info_panel', Layer 'Layer 2', Frame 2, Line 287
var imgContainer:ImageContainer=new ImageContainer();

Why are these errors coming up?

Here is the class:

package com.displayObj
{

import flash.events.*;
import flash.display.MovieClip;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.*;
import flash.geom.*;
//class to display a bitmap data with reflexion
public class ImageContainer extends MovieClip {
    //bitmap object
    private var bmp:Bitmap;
    //reflection bitmap object
    private var reflexion:Bitmap;
    //ref bitmap data
    private var refData:BitmapData;
    //reflextion mask
    private var refmask:Sprite;

    public function ImageContainer() {
        //initialize the bmp and the reflexion object
        bmp=new Bitmap();
        reflexion=new Bitmap();

        //and add it to the image container
        this.addChild(bmp);

    }
    //setter for the bitmap data
    public function set imageData(value:BitmapData) {
        //if the old value is not null dispose the data
        if (bmp.bitmapData!=null) {
            bmp.bitmapData.dispose();
        }
        //set the new data
        bmp.bitmapData=value;
        //update the position
        reflexion.x=bmp.x=-bmp.width/2;
        bmp.y=-bmp.height/2;
        //flip the reflexion object
        reflexion.scaleY=-1;
        //force the smoothing
        bmp.smoothing=true;
        //create the reflextion bitmap data
        refData=new BitmapData(bmp.width,bmp.height/4);
        //and copy  the pixel for the bmp bitmapdata
        refData.copyPixels(bmp.bitmapData,new Rectangle(0,3*bmp.height/4,bmp.width,bmp.height/4),new Point(0,0));

        //set the bitmap objects bitmap data
        reflexion.bitmapData=refData;
        //set the smoothing to true
        reflexion.smoothing=true;
        //update the reflextion position
        reflexion.y=bmp.height/2+reflexion.height+5;
        //create the mask
        refmask=new Sprite();
        //fill it with a gradient color (see help files)
        var fillType:String = GradientType.LINEAR;
          var colors:Array = [0xFFFFFF, 0xFFFFFF];
          var alphas:Array = [0.5, 0];
          var ratios:Array = [0x00, 0xFF];
          var matr:Matrix = new Matrix();
          matr.createGradientBox(reflexion.width, reflexion.height, Math.PI/2, 0, 0);
          var spreadMethod:String = SpreadMethod.PAD;
          refmask.graphics.beginGradientFill(fillType, colors, alphas, ratios, matr, spreadMethod);  
          refmask.graphics.drawRect(0,0,reflexion.width, reflexion.height);
         //see help files

          //update the ref mask postion
          refmask.x=reflexion.x;
          refmask.y=reflexion.y-reflexion.height;
          //cash as bitmap both the relexion mask and reflexion sprite 
          refmask.cacheAsBitmap=true;
          reflexion.cacheAsBitmap=true;
          //set the mask on the reflextion
         reflexion.mask=refmask;
         //add the mask
        addChild(refmask);

        this.scaleX=1;
        this.scaleY=1;
        //add reflexion
        addChild(reflexion);
    }
}

Answer 1

http://stackoverflow.com/questions/2204302/as4-flash-importing-custom-classes

Solution: rename the class to reflect the name of the file: ImageContainer.as instead of ImgViewer.as