Alter Identity Property Of A Column To NOT FOR REPLICATION

i need to alter all foreign keys in my database and uncheck the
"Enforce relationship for replication" check box. Using the EM, I
extracted the code snippet below. unfortunately, when i run this test
from query analyzer, then go back into the EM, the box is still
checked.

can anyone tell me what i am missing? any advice on unsetting this
attribute globally would be appreciated!

BEGIN TRANSACTION
SET QUOTED_IDENTIFIER ON
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
SET ARITHABORT ON
SET NUMERIC_ROUNDABORT OFF
SET CONCAT_NULL_YIELDS_NULL ON
SET ANSI_NULLS ON
SET ANSI_PADDING ON
SET ANSI_WARNINGS ON
COMMIT
BEGIN TRANSACTION
ALTER TABLE dbo.CustomerCustomerDemo
DROP CONSTRAINT FK_CustomerCustomerDemo_Customers
GO
COMMIT
BEGIN TRANSACTION
ALTER TABLE dbo.CustomerCustomerDemo WITH NOCHECK ADD CONSTRAINT
FK_CustomerCustomerDemo_Customers FOREIGN KEY
(
CustomerID
) REFERENCES dbo.Customers
(
CustomerID
) NOT FOR REPLICATION

GO
COMMIT

thanks!!