Load New Form, close old form

I have a login form. When a user clicks the login button I want to open a new form and close the login form although when I do this Visual Studios stops debugging and closes all forms.

How do I keep it in debug, close the login form and open the new form. I tried Me.Hide() and Me.Close().

Me.Close() closed everything and Me.Hide() hid the login form but then when I closed the new form the process was still attached to the hidden form.

any ideas?

thanks

j