So, I've been having this problem for a few days, the first time a open the game I'm able to play ~30 minutes, then I get network trouble, and when I reconnect to the server I was before I can play about 5 minutes, and then I get NETWORK TROUBLE all over again, this happens in every server I play and it's VERY frustrating. This has happened ever since I updated to MTA 1.5.
This is my speed test, everything seems okay: http://www.speedtest.net/my-result/4590219247