Why My Stored Proc Won't Compile?

When I try and create the following stored procedure, I get the following error message:


Any ideas as to what went wrong? Here is the stored procedure


USE [DBS07]
GO
/****** Object:  StoredProcedure [dbo].[updateMarketName]    Script Date: 09/17/2007 22:28:20 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[updateSubMarketName]
(
  @inMarketId     int,
  @inSubMarketId    int,
  @inSubMarketDescription  nvarchar(100),
        @inActive     nvarchar(2),
  @inLastUpdateDate   datetime,
  @inLastUpdateUser   nvarchar(100)
)
AS
 SET NOCOUNT OFF;
UPDATE [SubMarket] SET [SubMarketDescription] = @inSubMarketDescription, [Active]= @inActive, [LastUpdateDate] = @inLastUpdateDate,[LastUpdateUser] = @inLastUpdateDateUser
WHERE ([MarketId] = @inMarketId)
AND (SubMarketId]= @inSubMarketId)


Here is my error message


Error message in Red:
Msg 137, Level 15, State 2, Procedure updateSubMarketName, Line 12
Must declare the scalar variable "@inLastUpdateDateUser".