How do I use first, previous, next, last button for datagridview ?

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VB

SQL

Well Im trying to add First, Previous, Next, Last Button for DataGridView1 but its only works when my Application started. If I add something to Database then these buttons are not working. And also not throwing any Errors to.

Let say I started my Test Application. DatagridView populated well. All buttons working great.

Now I add something using INSERT button or Update or Delete then

They no longer working.

I have no idea what to do.

Im adding the code please suggest what to do.

What I have tried:

Private Sub BTN_Next(Sender As Object, e As EventArgs) Handles BTN_Next.Click
DepartmentBindingSource.Movenext()
End Sub.

I'm suspecting that my DepartmentBindingSource is not updating with modified Database.