Partitioning error

Hi,

I am trying to implement partitioning on a table
depending upon the fiscal_month value...

The current values are from 1-6...

Create partition function LoadDataPartitionFunction ( smallint)
as
Range for values (1,2,3,4,5,6)

-- drop partition scheme LoadDataPartitionScheme
create partition scheme LoadDataPartitionScheme
as
Partition LoadDataPartitionFunction ALL to ([PRIMARY])

CREATE TABLE Load_Data_Partition (
[RowID] [int] NOT NULL,
[Fiscal_Month] [smallint] NOT NULL,
[Fiscal_Year] [smallint] NOT NULL,
...

[Service] [nvarchar](100) COLLATE
) ON LoadDataPartitionScheme (Fiscal_Month)

truncate table Load_Data_old -- same schema as load_data_partition
Alter table load_data_partition switch partition 1 to Load_Data_old

-- which month's data to be moved out
alter partition function LoadDataPartitionFunction () merge range (1)

Alter partition scheme LoadDataPartitionScheme next used [primary]

-- which months data to be moved in
alter partition function LoadDataPartitionFunction () split range(7)

Select * from sys.partition_range_values

function_id boundary_id parameter_id value
---- ---- ---- --
65545 1 1 2
65545 2 1 3
65545 3 1 4
65545 4 1 5
65545 5 1 6
65545 6 1 7

Alter table [Load_Data_new] switch to [Load_Data_partition] partition 6

ALTER TABLE SWITCH statement failed. Check constraints of source table Load_Data_new' allow values that are not allowed by range defined by partition 6 on target table 'Load_Data_partition'.

Values in Load_Data_new for fiscal_month is 7

But when i try

Insert into [Load_Data_partition]
Select * from [Load_Data_new]
where fiscal_month = 7

it works fine...

reference used : http://www.sqlskills.com/resources/Whitepapers/Partitioning%20in%20SQL%20Server%202005%20Beta%20I I.htmI got the answer..

Alter table Load_Data_new add constraint load_data_new_month check ( fiscal_month =7)

even though the Load_Data_new table has only month = 7 data...
a constraint is mandatory....