This is already known to Kov and we are trying to get him to fix stuff. After all it cant be that -everyone- has the same problems like you has. Otherwise FH would be empty and it isnt. You seem to be the only one having these problem with a connection lost, so its definitely not the game but your computer or the connection.
First thing when things like this happen is that you yourself have to look arround if your computer is set right, if the settings fit and how the internet connection is. First of all is that Firewall and Anti-Virus programms needs to be checked. It is no excuse to say it only happens with the FH game, it is also a matter of setting up the programms right.
Plus the game cant be made fit to one user, it has to fit to all users, and since this is a matter of fact, we cant and wont guarantee that the game will run on anyones computer fluid and with absolute no problems.
And just a site note. Kov isnt viewing this forum. So i have noticed your problem and he will get the information. But a simple "the game stops working and closes down" is nothing in information that is any usefull to find out what the problem is.
My suggestion is as mentioned, check firewall, check anti-virus programm, update your operating system, update your graphic-card drivers and look for a stable internet connection.
I am closing this thread for now. I dont want to sound harsh, if that was too harsh then i let you know this isnt ment to. Be sure to check your system first (and do it and not just say its all fine). But as i sed, we cant help you with this lack of information, but will bring it up to kov.