Problem with propertyeditor (Need help ASAP)

Hi!

I'm having some trouble with a PropertyEditor in a component that I'm writing.
The code (or at least the same structure ;)
------
type
 TMyForm = class(TForm);
    slAF : TStringList;
    slBF : TStringList;
    ....
 end;
 TC = class;
 TA = class(TComponent)
     ...    
     procedure DoStuff;
   private
     FC : TC;
     slA : TStringList;
     slB : TStringList;
   public
     constructor Create;
     destructor  Destroy; override;
   published
     property pFC : TC read FC;
   end;
 TC = class
     FA : TA;
     procedure Add(a,b : String);
 end;
 TB = class(TPropertyEditor)
   function GetAttributes : TPropertyAttributes; override;
   procedure Edit;override;
 end;
 
 implementation
 
 constructor TA.Create(AOwner : TComponent);
 begin
    inherited Create(AOwner);
    FC := TC.Create;
    FC.FA := Self;
    slA := TStringList.Create;
    slB := TStringList.Create;
 end;
 
 destructor TA.Destroy;
 begin
    FC.Free;
    slA.Free;
    slB.Free;
    inherited Destroy;
 end;

 procedure TA.DoStuff;
 begin
   // DO stuff with data in slA and slB.
 end;
 
 procedure TC.Add(a,b : String);
 begin
      FA.slA.Add(a);
      FA.slB.Add(b);
 end;
 
 function TB.GetAttributes: TPropertyAttributes;
 begin
      Result := [paDialog];
 end;
 
 procedure TB.Edit;
 var
    myForm : TMyForm;
    xC : TC;
    i : Integer;
 begin
    myForm := TMyForm.Create(self);
    try
         xC := TC(GetComponent(0));
         myForm.slA.Assign(xC.slA);
         myForm.slA.Assign(xC.slB);
         if myForm.ShowModal = mrOK then
         begin
           xC.slA.Clear;
           xC.slB.Clear
           for i := 0 to myForm.slA.Count -1 do
               xC.slA.Add(myForm.slA[i]);
           for i := 0 to myForm.slB.Count -1 do
              xC.slB.Add(myForm.slB[i]);
         end;
    finally
         myForm.Free;
    end;
 end;

----
In the register procedure I register TA and TB. TB is assigned to TC.
The problem is that I can see the last entered data that in the form every time I click on the property FC in the object inspector. But the procedure DoStuff cant see the data when I run the program and call the procedure. But if
I call the procedure TA.pFC.Add('A data','More data') and then call DoStuff the component sees the two strings that I added before. Why ???
What am I doing wrong ???
Am I forgetting something ???

Regards,
  Tomas Helgi