First question, but not directed at you : can version 1.4 play on a 1.31 server ? If you can't, that'll be causing a bunch of problems.
Second, directed at Vasya, give yourself a clean install
. Try installing Soldat into a different folder and playing it again. Oh, and the next time you come complaining of a problem, try giving some specifics; maybe what you had done to the game recently (e.g. reg hack, hacking, etc
) or if you'd had any computer upgrades. Although some of these may seem unrelated to your problem, computers are massively complex and can be weird in that everything relates to each other.