Problem with frames: Error reading form: "Class TFrameBalance not found"

I'm maintaining an existing application and the developer has made almost all of the forms 'dynamic', in other words they are not declared in the DPR file, they are not 'Auto-Create' forms and they are not 'Available forms'.

So now my problem with frames:
I have a form e.g.
  ..\Balance\Forms\BalanceForm.pas
  ..\Balance\Forms\BalanceForm.dfm
It uses a frame:
  ..\Balance\Forms\BalanceFrame.pas
  ..\Balance\Forms\BalanceFrame.dfm

If I open the frame into the IDE *first*, and *then* open the form *second* I get no problem.
But if I open the form *first* I get error:
=================
Error Reading Form
Class TFrameBalance not found. Ignore the error and continue?
=================

This same problem exists throughout the application every time there is a form that uses frames.

Please help :S

Here is some code that will hopefully help:

  ..\Balance\Forms\BalanceForm.pas

unit BalanceForm;

interface

uses
 ...
  AuthResultFrame,
  BalanceFrame;

type
  TFormBalance = class(TFormWizard)
    FrameAuthResult: TFrameAuthResult;
    FrameBalance: TFrameBalance;
    ...
  private
    ...
  public
  end;

var
  FormBalance: TFormBalance;

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  ..\Balance\Forms\BalanceForm.pas

inherited FormBalance: TFormBalance
  ...
  inherited PanelMain: TPanel
    inherited Wizard: TbsWizard
      ...
        inline FrameBalance: TFrameBalance
          ...
        end
      object WizardPageResults: TbsWizardPage
        object GroupBoxAuthResults: TRzGroupBox
          object PanelAuthResults: TRzPanel
            inline FrameAuthResult: TFrameAuthResult
            end
          end
        end
      end
  end

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==========================================================================

 ..\Balance\Forms\BalanceFrame.pas

unit BalanceFrame;

interface

uses
 ...
  CardListFrame;

type

  TFrameBalance = class(TFrame)
    ...
  private
    ...
    FFrameCardList: TFrameCardList;
  public
    ... 
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  end;

implementation

constructor TFrameBalance.Create(AOwner: TComponent);
begin
  inherited;
  FFrameCardList := TFrameCardList.Create(Self,GroupBoxCardNumbers,cstBalance);
  with FFrameCardList do
  begin
    Top := 17;
    Left := 2;
    OnUpdateMessage := DoUpdateMessage;
  end;
end;

destructor TFrameBalance.Destroy;
begin
  FFrameCardList.Free;
  inherited;
end;

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 ..\Balance\Forms\BalanceFrame.dfm

object FrameBalance: TFrameBalance
  ...
  object GroupBoxCardNumbers: TRzGroupBox
    Left = 0
    Top = 65
    Width = 495
    Height = 283
    Align = alTop
    GroupStyle = gsStandard
  end
  ...
end

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=====================================================================

  ..\Common\Forms\CardListFrame.pas

unit CardListFrame;

uses
  ...
  CardEditBoxFrame;

type
  TFrameCardList = class(TFrame)
  private
    ...
  public
    ...
    constructor Create(AOwner: TComponent; AParent: TWinControl; AScanType: TCardScanType); reintroduce;
    destructor Destroy; override;
  end;

implementation

constructor TFrameCardList.Create(AOwner: TComponent; AParent: TWinControl; AScanType: TCardScanType);
begin
  ...
  CreateEditBoxes(AOwner);
  ...
end;

destructor TFrameCardList.Destroy;
begin
  FListEditBoxes.Free;
  inherited;
end;

procedure TFrameCardList.CreateEditBoxes(AOwner: TComponent);
var
  ...
  CardEditBoxFrame: TFrameCardEditBox;
begin
  for i := 1 to (FMaxRows * FMaxColumns) do
  begin
    ColumnNumber := ((i-1) div FMaxRows) + 1;
    CardEditBoxFrame := TFrameCardEditBox.Create(AOwner);
    with CardEditBoxFrame do
    begin
      Parent := TWinControl(Self.FindComponent(Format('PanelBox%d',[ColumnNumber])));
      ...
    end;
    FListEditBoxes.Add(CardEditBoxFrame);
  end;
end;

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  ..\Common\Forms\CardListFrame.dfm

object FrameCardList: TFrameCardList
  Left = 0
  Top = 0
  Width = 501
  Height = 170
  TabOrder = 0
end

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