Bukkit

Hi,

I've a problem with your plugins of my server : Can you help me ?

2013-07-12 17:38:07 [SEVERE] Could not load 'plugins/ShadowQuests.jar' in folder 'plugins' org.bukkit.plugin.UnknownDependencyException: Spout at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:195) at org.bukkit.craftbukkit.v1_6_R1.CraftServer.loadPlugins(CraftServer.java:239) at org.bukkit.craftbukkit.v1_6_R1.CraftServer.<init>(CraftServer.java:217) at net.minecraft.server.v1_6_R1.PlayerList.<init>(PlayerList.java:55) at net.minecraft.server.v1_6_R1.DedicatedPlayerList.<init>(SourceFile:11) at net.minecraft.server.v1_6_R1.DedicatedServer.init(DedicatedServer.java:106) at net.minecraft.server.v1_6_R1.MinecraftServer.run(MinecraftServer.java:391) at net.minecraft.server.v1_6_R1.ThreadServerApplication.run(SourceFile:582)