error trying to save multiple new records in VB.net windows app using VS 2008

When I save a new record in my app all works well for the first new record. Any subsequent records I try to add give me this error:
update requires a valid updatecommand when passed datarow collection with modified rows

here is my code:

   Private Sub SaveNewRecord()
        Try
            FurnacePartPoursBindingSource.Current("item") = Me.cboItems.Text
            FurnacePartPoursBindingSource.Current("Entry Number") = NewKeyValue
            FurnacePartPoursBindingSource.Current("Operator") = cboOperator.SelectedValue
            Me.Validate()
            Me.FurnacePartPoursBindingSource.EndEdit()

            If Me.PctDataSet.HasErrors Then
                    ...
                Exit Sub
            Else
                Me.FurnacePartPoursTableAdapter.Update(Me.PctDataSet.FurnacePartPours) ' error occurs here
            End If

end sub

Thanks, bmutchStart Free Trial