Relationship issue

Question

Hi.
I am using sql server 2005 and vb 2008 from visual studio 2008.
Opened vb and created a database with 2 tables namely client and trousers having fields as following:
client(client_id, name)......client_id as pk
trousers(trousers_id,client_id,waist,leg).......trousers_id as pk
created relationship between both table i.e client_id(pk) from client table with client_id(FK) from tousers table.
also added the datasource and drag both table on a form
run the program and entered some data and closed the program. i compiled the program again but when i tried to insert a new record the client_id which is automatically generated, gives me an id which already exist, thus when saving vb says that the unique already exists.
Here are the codes from the form
Public Class Form1
    Private Sub ClientBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ClientBindingNavigatorSaveItem.Click
        Me.Validate()
        Me.ClientBindingSource.EndEdit()
        Me.TableAdapterManager.UpdateAll(Me.TRYDataSet)
    End Sub
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'TODO: This line of code loads data into the 'TRYDataSet.trousers' table. You can move, or remove it, as needed.
        Me.TrousersTableAdapter.Fill(Me.TRYDataSet.trousers)
        'TODO: This line of code loads data into the 'TRYDataSet.client' table. You can move, or remove it, as needed.
        Me.ClientTableAdapter.Fill(Me.TRYDataSet.client)
    End Sub
End Class
............i did the same thing previously using vb 2005 and added some codes to update my trousers table. In vb 2005 the codes are different.
any help please.

Answer 1

are you sure you are sending proper clientID to trousers
i think there is no need of check
CONSTRAINT  when there is foreign key is define
you can drop check constraint 
ALTER TABLE [dbo].[trousers] CHECK CONSTRAINT [FK_trousers_client]