Thank you for the update Redstiza.

My first thought is that the wireless connection is being lost somewhere. Generally, a wired connection is a better option, especially for an MMO.

Try to connect with a wired Ethernet cable if possible.

Additionally, you can try resetting your router by turning it off and back on. Also make sure that no other programs are running when you try to launch the game.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!