Impossible to connect to server-compleltey clueless why

i'm woundering if u have some sort of logger for connections.my friends play on your server,but i cant get in,dosnt matter what i do,get kick'd to arma3-login screen..no errror-messages or missing file-messages,even tried to download all the mods from sp4r links on page to a separat folder and changed it in the batfile-didnt work.

so i if u have any kind of errorlog for connections and can tell me wtf is wrong for me i woud be a happy camper-my ingame name is heedn.