Outdated version, cant connect to server (my version 1.7.4....)

[0megalord 0]

ok so my version is like 1.7.4 or something like that and the new version is 1.7.5 so how do i update my game? YES i do have six launcher and yes it does update when it loads but for some reason my game doesnt update. Yes i have purchesed Operation arrow head on steam and i downloaded the free version of arma 2. Theres 3 errors that happen,

1.When i click to join a server (Some servers say) Bad server resquest

2.When i just keep clicking random servers i finaly join one, i get in the lobby and hit connect or whatever, it loads fine and everything but right as the world loads, i cant move and in a very faint white colour it says something like you have a bad version of dayZ your version is 1.7.4 and the server version is 1.7.5

3. every server i join once im in the lobby it says Weapon.bin hatchet (this is not correctly how it shows but i just click x and its fine i guess?

Please help me! I would just love to kill zombies! And thanks for the help!