Nothing on the server has changed in a good while, and If it's working for everyone but you I'd suspect it's not the server. Without knowing any specifics about your problem it's also hard to tell you what it could be. I'd say make sure your internet connection is stable, make sure you're not dropping connection and there's no cockroaches living in your router that might be causing issues. Also make sure you have the following ports forwarded on your router and in your firewall on the following protocols 9987 UDP, 10011 TCP and 30033 TCP and make sure UPnP is enabled on your router.
Other than that reinstall and/or update teamspeak, but backup your soundboard and any plugins first. All I see on the TS server is that you get disconnected with the reason "connection lost."