Automatic DataGridView "refresh"?

[LeoVBNET]

Hi
In Form1 I have a Datagridview showing the content of a table from DataBase.

In Form2 I add or modify a row in that table. So, when I get back to Form1 I would want the DataGridView get updated automatically.

To populate the DGV I use a Linq To Sql query:

Dim Query = From .....
Me.DGV.DataSource = Query
 

or

Dim Query = From .....
Me.BindingSource1.DataSource = Query
Me.DGV.DataSource = Me.BindingSource1 
 

I have been trying to use:
BindSource (as DataGridView.DataSource)
BindingSource.ResetBinding(False)
DGV.Refresh()
etc...

Also, I added a new row in the same Fomr1 and nothing happens.

Thanks for advance !!!