[.FuneraL.]

pawn Код:

new pname[MAX_PLAYER_NAME];
   new string[256]
   GetPlayerName(playerid, pName, sizeof(pName));
   format(string, sizeof(string), "{A2B5CD}%s Entrou no Servidor!", pName);
   SendClientMessageToAll(COLOR_BRUNO, string);
   return 1;
}

Tente Assim x)

@Edit , Corrigido Histire.