Command Signs Error

[22:09:06 ERROR]: Could not load 'plugins\CommandSigns.jar' in folder 'plugins'
org.bukkit.plugin.UnknownDependencyException: Vault
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager
.java:216) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.ja
va:355) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.<init>(CraftServer.java:31
7) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at net.minecraft.server.v1_7_R3.PlayerList.<init>(PlayerList.java:68) [c
raftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at net.minecraft.server.v1_7_R3.DedicatedPlayerList.<init>(SourceFile:14
) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.jav
a:126) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:436) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-b3084jnks]