Problème mod plane/ww2 gun/véhicule

[blablapif]

Salut, avec des amis on a fait un serveur et dessus on veux installer trois mod (plane, véhicule ww2 et ww2 gun), l'installation et fait mais quand on veux lancer le serveur on a ce message d'erreur :-(

[WARNING] Failed to log to server.log
java.io.IOException: Couldn't get lock for server.log
at java.util.logging.FileHandler.openFiles(Unknown Source)
at java.util.logging.FileHandler.<init>(Unknown Source)
at ev.a(SourceFile:47)
at
net.minecraft.server.MinecraftServer.c(MinecraftSe
rver.java:71)
at
net.minecraft.server.MinecraftServer.run(Minecraft
Server.java:255)
at bq.run(SourceFile:422)
[INFO] ModLoader Server Beta 1.6.6v4 Initializing...
[SEVERE] Unexpected exception
java.lang.RuntimeException: ModLoader has failed to initialize.
at ModLoader.ThrowException(ModLoader.java:1208)
at ModLoader.init(ModLoader.java:629)
at ModLoader.Init(ModLoader.java:1271)
at
net.minecraft.server.MinecraftServer.c(MinecraftSe
rver.java:72)
at
net.minecraft.server.MinecraftServer.run(Minecraft
Server.java:255)
at bq.run(SourceFile:422)
Caused by: java.lang.RuntimeException: Exception occured in ModLoader
at ModLoader.ThrowException(ModLoader.java:1208)
at ModLoader.ThrowException(ModLoader.java:1213)
at ModLoader.addMod(ModLoader.java:118)
at ModLoader.readFromClassPath(ModLoader.java:905)
at ModLoader.init(ModLoader.java:606)
... 4 more
Caused by: java.lang.RuntimeException: ModLoaderMultiplayer
at ModLoader.ThrowException(ModLoader.java:1208)
at ModLoaderMp.init(ModLoaderMp.java:314)
at
ModLoaderMp.RegisterEntityTrackerEntry(ModLoaderMp
.java:60)
at
ModLoaderMp.RegisterEntityTrackerEntry(ModLoaderMp
.java:53)
at mod_Planes.<init>(mod_Planes.java:22)
at
sun.reflect.NativeConstructorAccessorImpl.newInsta
nce0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInsta
nce(Unknown Source)
at
sun.reflect.DelegatingConstructorAccessorImpl.newI
nstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at ModLoader.addMod(ModLoader.java:104)
... 6 more
Caused by: java.io.IOException: Accès refusé
at
java.io.WinNTFileSystem.createFileExclusively(Nati
ve Method)
at java.io.File.createNewFile(Unknown Source)
at ModLoaderMp.init(ModLoaderMp.java:296)
... 16 more

Et on a pas la moindre idée de comment corrigé ce problème, on a posté sur jvc sans résultat alors j'espère qu'ici quelqu'un nous aidera :gni: