when i set a spawn to a location, that location doesnt have spawn protection, i also set /setspawnworld
Did you do /setworldspawn? You can also use iProtector or a similar plugin to protect areas, other than spawn protection. As far as I know, it works just fine with MSpawns (correct me if I'm wrong).
oks thanks it just work when i restart the server, is there any plugin similar to iprotector for alpha4?