i agree with what you are saying. i have checked the table and all looks fine. below is a create script from my db... it seems to agree as well. so why is dnn reporting this error? im lost.
USE [Dotnetnuke]
GO
/****** Object: Table [dbo].[ScheduleHistory] Script Date: 09/22/2010 19:43:54 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ScheduleHistory](
[ScheduleHistoryID] [int] IDENTITY(1,1) NOT NULL,
[ScheduleID] [int] NOT NULL,
[StartDate] [datetime] NOT NULL,
[EndDate] [datetime] NULL,
[Succeeded] [bit] NULL,
[LogNotes] [ntext] NULL,
[NextStart] [datetime] NULL,
[Server] [nvarchar](150) NULL,
CONSTRAINT [PK_ScheduleHistory] PRIMARY KEY CLUSTERED
(
[ScheduleHistoryID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
ALTER TABLE [dbo].[ScheduleHistory] WITH NOCHECK ADD CONSTRAINT [FK_ScheduleHistory_Schedule] FOREIGN KEY([ScheduleID])
REFERENCES [dbo].[Schedule] ([ScheduleID])
ON DELETE CASCADE
NOT FOR REPLICATION
GO
ALTER TABLE [dbo].[ScheduleHistory] CHECK CONSTRAINT [FK_ScheduleHistory_Schedule]
GO