>i make a form with two grids
>have a relation one to many
>way when i run the form , the grid1 shows the records that it has and show some lines with asterisc (**********) too?

You have one-to-many set and you don't want that set. When you set one-to-many and then put the many side in a grid you get ********* records as virtual parent records for each additional child record beyond the first one.

Set your relationship but DO NOT set the one-to-many and you should ge the grids the way you want them.