problem in database using VB 2010

[emperror123]

dear all

i have do the database but when i debug it, it come out this error which is
Concurrency violation: the UpdateCommand affected 0 of the expected 1 records.

i have search many article from google, i still unable to solve it, below are my coding hopefully you all may help me

       If btnSave.Text = "Save" Then
            '   DateDonatedDateTimePicker.Text = Today
            If SuccessCheckBox.Checked = True Then
                RemarkTextBox.Text = "No Remark"
            End If
            Me.Validate()
            Me.DonorStatusBindingSource.EndEdit()
            frmBlood.DonorInfoBindingSource.EndEdit()
           [SIZE=4] [COLOR=yellow]Me.TableAdapterManager.UpdateAll(Me.PatientDataSet)[/COLOR][/SIZE]
            Me.DataGridView1.DataSource = Me.PatientDataSet.DonorStatus.Select("IC='" & Me.ICTextBox.Text & "'")
            btnCancel.Text = "Back"
            btnSave.Enabled = False
        ElseIf btnSave.Text = "Add" Then
            Me.DonorStatusBindingSource.EndEdit()
            Me.DonorStatusBindingSource.AddNew()
            Me.ICTextBox.Text = frmBlood.txtIC.Text()
            btnSave.Text = "Save"
            btnCancel.Text = "Cancel"
        End If

the yellow highlight is the one place that error occur

 

[behnam9856]

i offer u to use Linq... easy to use and powerful

put ur project here if its possible.