Tekkit Lite: Welt speichert nicht

Hallo, ich spiel mit ein paar Freunden Tekkit Lite, aber wenn wir nach ein paar stunden wieder auf den Server joinen bekommen wir ein komplett neue Welt. Kann uns jemand helfen?
Danke im Voraus.

wir haben ihn normal runtergefahren und er ist auch nicht gecrasht.
Username: jan00mc

Log:
2014-04-27 08:39:56 [INFO] Starting minecraft server version 1.4.7
2014-04-27 08:40:07 [INFO] Loading properties
2014-04-27 08:40:07 [INFO] Default game type: SURVIVAL
2014-04-27 08:40:07 [INFO] Generating keypair
2014-04-27 08:40:08 [INFO] Starting [lexicon]Minecraft[/lexicon] server on *:46818
2014-04-27 08:40:11 [INFO] Preparing level "world"
2014-04-27 08:40:11 [INFO] Preparing start region for level 0
2014-04-27 08:40:12 [INFO] Preparing spawn area: 11%
2014-04-27 08:40:13 [INFO] Preparing spawn area: 30%
2014-04-27 08:40:14 [INFO] Preparing spawn area: 45%
2014-04-27 08:40:16 [INFO] Preparing spawn area: 60%
2014-04-27 08:40:17 [INFO] Preparing spawn area: 77%
2014-04-27 08:40:18 [INFO] Done (6.715s)! For help, type "help" or "?"
2014-04-27 08:40:28 [INFO] /37.228.135.77:54372 lost connection
2014-04-27 08:40:28 [INFO] Saving...
2014-04-27 08:40:30 [INFO] Saved the world
2014-04-27 08:41:15 [INFO] User XD_gamer33 connecting with mods [MFReloaded|CompatSufficientBiomes, OCS, factorization.misc, RedPowerWiring, BuildCraft|Transport, OmniTools, AdvancedPowerManagement, RedPowerCompat, WR-CBE|Core, MFReloaded|CompatIC2, factorization.dimensionalSlice, RedPowerLogic, ThermalExpansion|Energy, WR-CBE|RedPower, EnderStorage, AdvancedMachines, MFReloaded|CompatPams, mmmPowersuits, IronChest, MFReloaded|CompatRP2, BuildCraft|Energy, ImmibisCore, EE3, LogisticsPipes|Main, DimensionalDoors, ChickenChunks, factorization, RedPowerLighting, AppliedEnergistics, mod_bspkrsCore, RedPowerBase, MFReloaded|CompatExtraBiomes, MFReloaded, ThermalExpansion, NetherOres, BuildCraft|Silicon, weaponmod, APUnofficial, ThermalExpansion|Transport, IC2NuclearControl, BuildCraft|Core, ThermalExpansion|Factory, CompactSolars, DimensionalAnchors, MFReloaded|CompatForestry, IC2, StevesCarts, Mystcraft, WR-CBE|Addons, ComputerCraft, TreeCapitator, BuildCraft|Factory, RedPowerMachine, RedPowerCore, MFReloaded|CompatThaumcraft, CCTurtle, AdvancedRepulsionSystems, Tubestuff, RedPowerControl, MFReloaded|CompatTwilightForest, MFReloaded|CompatSoulShards, MFReloaded|CompatVanilla, RedPowerWorld, BuildCraft|Builders, MFReloaded|CompatXyCraft, PowerConverters]
2014-04-27 08:41:15 [INFO] XD_gamer33[/93.206.185.8:57120] logged in with entity id 5597 at (-250.5, 69.62000000476837, 249.5)
2014-04-27 08:42:04 [INFO] Opped XD_gamer33
2014-04-27 08:42:17 [INFO] [XD_gamer33: Set own game mode to Creative Mode]
2014-04-27 08:45:26 [INFO] Saving...
2014-04-27 08:45:26 [INFO] Saved the world
2014-04-27 08:47:46 [INFO] XD_gamer33 lost connection: disconnect.quitting
2014-04-27 08:47:56 [INFO] Stopping the server
2014-04-27 08:47:56 [INFO] Stopping server
2014-04-27 08:47:56 [INFO] Saving players
2014-04-27 08:47:56 [INFO] Saving worlds
2014-04-27 08:47:56 [INFO] Saving chunks for level 'world'/Overworld
2014-04-27 08:47:56 [INFO] Saving chunks for level 'world'/Nether
2014-04-27 08:47:56 [INFO] Stopping server

Ich versteh es ja auch nicht

ja

nachdem ich den weltverlust hatte