Passing Values Child to Child...Need Help

Question

I am a bit of a noob, and I'm having a problem.  I had posted about this before but I think I was explaining what I need to do in way to much of a complicated manner so I'm going to try and simplify this a bit.
I have 5 swf's.
- main.swf (parent)
- child01.swf
- child02.swf
- child03.swf
- child04.swf
When main.swf runs, it loads child03.swf on the bottom (eventhough levels are not relevent in AS3) child01.swf and child02.swf load on top of child03.swf.
main.swf has an arrow button, to proceed to the next screen.  When the arrow button is pressed it unloads child01.swf, child02.swf and child03.swf, it then loads child04.swf.
Here is my problem... child03.swf has dynamic text boxes, named tf0 - tf14, which get passed values by functions in each of those files.  I need to pass these same values to dynamic text boxes on child04.swf.
The thing that concerns me is that child01.swf and child02.swf get unloaded when the arrow button is pressed.  I would assume that the values stored in these text boxes get unloaded as well.  If this is the case I need to store these values before the unload happens, which I am not sure how to do.
Then once I store these values they need to pass to the dynamic text boxes, named tf15 - tf 29, in child04.swf.  I have been researching, and researching and cant find a solution.  Some talk about using LocalConnection.  kglad tried pointing me in the right direction using MovieClip, but I can't seem to get it working.
I am including the script for the relevent files.
main.swf
stop();
var Allergy_Tag:URLRequest = new URLRequest("child01.swf");
var Info_Tag:URLRequest = new URLRequest("child02.swf");
var Sec_A_B:URLRequest = new URLRequest("child03.swf");
var Sec_C_D:URLRequest = new URLRequest("child04.swf");
var AT_Loader:Loader = new Loader();
var IT_Loader:Loader = new Loader();
var AB_Loader:Loader = new Loader();
var CD_Loader:Loader = new Loader();
AT_Loader.x = 0;
AT_Loader.y = 85;
IT_Loader.x = 483;
IT_Loader.y = 85;
AB_Loader.x = 0;
AB_Loader.y = 0;
CD_Loader.x = 0;
CD_Loader.y = 0;
AT_Loader.load(Allergy_Tag);
IT_Loader.load(Info_Tag);
AB_Loader.load(Sec_A_B);
CD_Loader.load(Sec_C_D);
addChild(AT_Loader);
addChild(IT_Loader);
addChild(AB_Loader);
//arrow btn actions
arrowBtnMain.buttonMode = true;
arrowBtnMain.addEventListener(MouseEvent.ROLL_OVER , arrowBtnMainRollOver);
arrowBtnMain.addEventListener(MouseEvent.CLICK, arrowBtnMainClick);
function arrowBtnMainRollOver(event:MouseEvent):void{
arrowBtnMain.gotoAndPlay(2);
function arrowBtnMainClick(event:MouseEvent):void{
gotoAndStop(2);
    AT_Loader.unload();
    IT_Loader.unload();
    AB_Loader.unload();
    addChild(CD_Loader);
child03.swf
stop();
//changes text size on checkboxes
import fl.managers.StyleManager;
var textf:TextFormat = new TextFormat();
textf.size = 9;
StyleManager.setComponentStyle(CheckBox, "textFormat", textf);
StyleManager.setComponentStyle(CheckBox, "textPadding", 2);
//handles tag labels
var currentTF:uint = 0;
function clickCB(evt:MouseEvent): void {
    this["tf"+currentTF].text = CheckBox(evt.target).label;
  currentTF += 1;
for(var i:uint=0; i<30; i++){
this["cBox"+i].addEventListener(MouseEvent.CLICK, clickCB);
//handles text boxes
f_name.addEventListener(Event.CHANGE,copyText);
l_name.addEventListener(Event.CHANGE,copyText);
emer_01.addEventListener(Event.CHANGE,copyText);
emer_02.addEventListener(Event.CHANGE,copyText);
emer_03.addEventListener(Event.CHANGE,copyText);
function copyText(e:Event):void
    tf10.text = f_name.text;
    tf11.text = l_name.text;
    tf12.text = emer_01.text;
    tf13.text = emer_02.text;
    tf14.text = emer_03.text;
child04.swf
stop();
import fl.managers.StyleManager;
var textf:TextFormat = new TextFormat();
textf.size = 12;
StyleManager.setComponentStyle(CheckBox, "textFormat", textf);
StyleManager.setComponentStyle(CheckBox, "textPadding", 2);
//handles allergy beads
var currentTF:uint = 30;
function clickCB(evt:MouseEvent): void {
     this["tf"+currentTF].text = CheckBox(evt.target).label;
  currentTF += 1;
for(var i:uint=30; i<60; i++){
this["cBox"+i].addEventListener(MouseEvent.CLICK, clickCB);
Here is an example of some of the script I have tried to impliment on child04.swf to call the values of the dynamic text boxes on child03.swf
tf15.addEventListener(Event.CHANGE,importText);
function importText(e:Event):void
    tf15.text = MovieClip(AT_Loader.content).tf0;

Answer 1

Thx kglad,
I'm still working with it.  However I am getting a strange output message.  I was working with the script to get those to pass, and started getting it.  I then removed the added script and I'm still getting it.
TypeError: Error #1034: Type Coercion failed: cannot convert "
" to flash.display.MovieClip.
at child03_fla::MainTimeline/frame1()
Here is the script I currently have on the main.swf and still recieving this message... Weird because at this point I'm not trying to convert anything to a MovieClip
stop();
var Allergy_Tag:URLRequest = new URLRequest("allergy_tags.swf");
var Info_Tag:URLRequest = new URLRequest("info_tag.swf");
var Sec_A_B:URLRequest = new URLRequest("checks_and_texts.swf");
var Sec_C_D:URLRequest = new URLRequest("sec_c_d.swf");
var AT_Loader:Loader = new Loader();
var IT_Loader:Loader = new Loader();
var AB_Loader:Loader = new Loader();
var CD_Loader:Loader = new Loader();
AT_Loader.x = 0;
AT_Loader.y = 85;
IT_Loader.x = 483;
IT_Loader.y = 85;
AB_Loader.x = 0;
AB_Loader.y = 0;
CD_Loader.x = 0;
CD_Loader.y = 0;
AT_Loader.load(Allergy_Tag);
IT_Loader.load(Info_Tag);
AB_Loader.load(Sec_A_B);
CD_Loader.load(Sec_C_D);
addChild(AT_Loader);
addChild(IT_Loader);
addChild(AB_Loader);
//arrow btn actions
arrowBtnMain.buttonMode = true;
arrowBtnMain.addEventListener(MouseEvent.ROLL_OVER , arrowBtnMainRollOver);
arrowBtnMain.addEventListener(MouseEvent.CLICK, arrowBtnMainClick);
function arrowBtnMainRollOver(event:MouseEvent):void{
arrowBtnMain.gotoAndPlay(2);
function arrowBtnMainClick(event:MouseEvent):void{
AT_Loader.unload();
IT_Loader.unload();
AB_Loader.unload(); 
addChild(CD_Loader);
removeChild(arrowBtnMain);