Unable to connect error SOLUTION

For people that do everything right , and they log fine on the server , but friends get the error " unable to connect " i suggest you to do exacly as this guy says : [You must be registered and logged in to see this link.]

For me it still have a problem at the moment , but im happy that i finnaly see on the console that my host and stuff login.
Before that host didnt login.
I feel that im close to do it , this video got me closer , i suggest you do to see it.
Follow exacly the video and do exacly what he says , for any questions pm me.

Greetings giorgos.