Smooth migration

[DEGE]

have a VB 3.8.4 fully licensed installed and working. Since I'm having some serious performance issues with my hosting provider and after several instances of no solution I decided to migrate all my VB to a new hosting.

As anyone here may know, migrating a VB is quite a mess. You really don't know when the DNS servers will be updated, and if you don't want to lose any data you have to be extra careful.

So I did what the migration documentation says

- Moved all my files to the new server
- Edited the config.php in the includes directory to point to the new database
- backed up all my database and restored it on the new server

The point is... I cannot get it to work on the new server prior to migrate my domain in the DNS
Servers. I cannot log with any user neither the superadministrator user. It always rejects my login attempts and in some cases redirects me to my old server.

As the title of my post says, I want to do a smooth and flawless migration from one server to the other. I want to configure the new installation as "Board Closed" so that I can move the lastest SQL tables backup to it before opening it to the users.

Can anybody tell me what am I doing wrong?
What am I supposed to do to do a flawless migration?
Do I have to migrate my DNS servers and pray that the whole VB system in the new server works fine as an act of faith?

I'm rather a "see to beleive" man, so it sounds very strange for me to trust in a blind system migration.

Hope anyone can help me.

DEGE

PS: This post is very similar to Moved to new domain; still trying to connect to old domain. by Ombra who didn't find any helpful answers also. Is there any one that knows how VB forums manages its related domains?