I want to install hero chat on a tekkit server, i recall it working once but threw out the old server file because of other issues but now when i try install it again an get this. It seems to be working on some level but when it comes to chat it freaks out. If a copy of my perms is needed, say so.

16:05:38 [INFO] [Vault] Loading Vault v1.2.13-b148.
16:05:38 [INFO] [Vault][Economy] Essentials Economy found: Waiting
16:05:38 [INFO] [Vault][Permission] PermissionsEx found: Waiting
16:05:38 [INFO] [Vault][Permission] SuperPermissions loaded as backup permission system.
16:05:38 [INFO] [Vault][Chat] PermissionsEx found: Waiting
16:05:38 [SEVERE] Error occurred while enabling Vault v1.2.13-b148 (Is it up to
date?): org.bukkit.plugin.PluginDescriptionFile.getAuthors()Ljava/util/List;
java.lang.NoSuchMethodError: org.bukkit.plugin.PluginDescriptionFile.getAuthors(
)Ljava/util/List;
at net.milkbowl.vault.Vault.onEnable(Vault.java:138)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:230)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:1057)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:380)
at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:200)
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:183
)
at org.bukkit.craftbukkit.CraftServer.(CraftServer.java:142)
at net.minecraft.server.ServerConfigurationManager.(ServerConfigur
ationManager.java:52)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:151)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:411)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)

You're using an incompatible version of Vault with your tekkit server. Find one that has the correct version for what Vault says it supports. Blindly updating isn't going to help.

If Tekkit is claiming to be 1.2.3+ then they obviously aren't using the correct bukkit API methods as this is why Vault changed them in the latest version.