I was playing with friends in a private match with hamachi, then i leave the server and when i try to get back in it says to me: "Your playlist data is older than the host" and that i should reconnect or restart the game, i did both but still same error. Is there any fix? Oh and when i tried entring an server with a green "*" it says something about playlists and stuff but it never ends updating. need help!

Well, run the installer again. There's surely something wrong with your IW4M installation (or you're running the wrong files)

iw4m/InstallIW4M.exe