Hi,
I think you have to insert manually first setting identity_insert option on for the table ORDERS as explained in the link below:
SyBooks Online
1> set identity_insert ORDERS on
2> go
1> insert into ORDERS(OrderID,CustID,OrderDate) values (1000,1,getdate())
2> go
(1 row affected)
1> select * from ORDERS
2> go
OrderID CustID OrderDate
----------------------------------------- ----------- --------------------------
1000 1 Jul 13 2011 9:37PM
(1 row affected)
1> insert into ORDERS(CustID,OrderDate) values (1,getdate())
2> go
Msg 585, Level 16, State 1:
Server 'PKD', Line 1:
Explicit value must be specified for identity field in table 'ORDERS' when IDENTITY_INSERT or IDENTITY_UPDATE is ON.
1> set identity_insert ORDERS off
2> go
1> insert into ORDERS(CustID,OrderDate) values (2,getdate())
2> go
(1 row affected)
1> select * from ORDERS
2> go
OrderID CustID OrderDate
----------------------------------------- ----------- --------------------------
1000 1 Jul 13 2011 9:37PM
1001 2 Jul 13 2011 9:37PM
(2 rows affected)
1>