hello i have been getting this error every time i start up.

19:10:30 [SEVERE] Error occurred while enabling Vault v1.2.14-b164 (Is it up to date?)
java.lang.NoSuchMethodError: in.mDev.MiracleM4n.mChatSuite.mChatSuite.getInfoReader()Lin/mDev/MiracleM4n/mChatSuite/api/InfoReader;
at net.milkbowl.vault.chat.plugins.Chat_mChatSuite.(Chat_mChatSuite.java:54)
at net.milkbowl.vault.Vault.loadChat(Vault.java:165)
at net.milkbowl.vault.Vault.onEnable(Vault.java:109)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:336)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:250)
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:232)
at org.bukkit.craftbukkit.CraftServer.(CraftServer.java:184)
at net.minecraft.server.ServerConfigurationManager.(ServerConfigurationManager.java:53)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:156)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:422)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)

I have no idea why it is doing this. i am running craftbukkit version 1.2.5 and I have re downloaded vault many times by now. it is confusing me very much. it seems to still be working with LWC. any help would be great. thanks!

mis-matched version of mChat with Vault will cause this. please make sure you're using compatible versions. You're using an outdated Vault with a newer mChat.