A way to fix this problem?

I'm trying to put in NoLagg in my server and its giving me this error, is there a reason why? Do I have to create a folder itself or do i have to remove this plugin since its broken? Please help

Code:

[06:19:43] [Server thread/ERROR]: Could not load 'plugins/NoLagg-1.90.4.jar' in folder 'plugins'
org.bukkit.plugin.UnknownDependencyException: BKCommonLib
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:196) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:255) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.<init>(CraftServer.java:233) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.PlayerList.<init>(PlayerList.java:63) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.DedicatedPlayerList.<init>(SourceFile:14) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:126) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:424) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit_beta_2974.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]

 

UnknownDependencyException: BKCommonLib