go over those containers again, make sure they match the current version of minecraft.
also, save files need an update too.
Command needed for teleport mod:
[optional argument]
/setwarp warpPointName save the current location for later use.
/warp playerName/warpPointName warps the user to that player or location. if a player have the same name with a location, player is used.
/warp playerName1 playerName2/warpPointName warps the given player1 to that player2 or location.
/summon playerName summon that player to the user.
/sethome [homeName] set current location as a player's home/spawn location if name isn't given, use home by default.
/home [homeName] warps the user to his home.
/back undo the lastest warp.
/back "death" go back to the place where the user died.