How to change external pictures in a sprite with a timer

Hi

I want to display the images from a webcam but everytime the sprite updates the picture disapears for a short period.

This is my code:

import flash.utils.Timer;

import flash.events.TimerEvent;

import flash.display.Loader;

import flash.display.LoaderInfo;

import flash.net.URLRequest;

import flash.events.Event;

import flash.display.Sprite;

var e45Sprite:Sprite = new Sprite;

var myTimer:Timer = new Timer(6000);

var imageLoader:Loader = new Loader();

var imageRequest:URLRequest = new URLRequest('http://someurl.jpg');

e45Sprite.x = 0;

e45Sprite.y = 0;

addChild(e45Sprite);

imageLoader.load(imageRequest);

imageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, showPic);

myTimer.addEventListener(TimerEvent.TIMER,someFunction);

myTimer.start();

function someFunction(event:TimerEvent) {

imageLoader.load(imageRequest);

imageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, showPic);

}

function showPic(Event):void {

e45Sprite.addChild(imageLoader);

}

Can anyone tell me how I can avoid the "blinks" or holes when the sprite gets updated?

Best regards