having issuses with updating to tekkit 3

[kingck]

im trying to update on a multicraft based host and i keep getting this error

Launcher/pack Version: not relevant

Operating System: linux ( i think)

Version of Java: unknown

Description of Problem:wont start

Error Messages:

^{28.05 11:11:56 [server] SEVERE at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:118)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.server.FMLBukkitHandler.onPreLoad(FMLBukkitHandler.java:113)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.loadMods(Loader.java:527)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.load(Loader.java:357)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.attemptDirLoad(Loader.java:419)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.attemptDirLoad(Loader.java:419)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.attemptDirLoad(Loader.java:419)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.attemptDirLoad(Loader.java:428)}

^{28.05 11:11:56 [server] SEVERE at cpw.mods.fml.common.Loader.loadModClass(Loader.java:440)}

^{28.05 11:11:56 [server] SEVERE at java.lang.Class.forName(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.lang.Class.forName0(Native Method)}

^{28.05 11:11:56 [server] SEVERE at java.lang.ClassLoader.loadClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.lang.ClassLoader.loadClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.lang.ClassLoader.loadClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.net.URLClassLoader.findClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.security.AccessController.doPrivileged(Native Method)}

^{28.05 11:11:56 [server] SEVERE at java.net.URLClassLoader$1.run(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.net.URLClassLoader$1.run(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.net.URLClassLoader.access$100(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.net.URLClassLoader.defineClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.security.SecureClassLoader.defineClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.lang.ClassLoader.defineClass(Unknown Source)}

^{28.05 11:11:56 [server] SEVERE at java.lang.ClassLoader.defineClass1(Native Method)}

^{28.05 11:11:56 [server] SEVERE java.lang.NoClassDefFoundError: net/minecraft/server/BaseModMp}

^{28.05 11:11:56 [server] INFO Loading mods from /opt/multicraft/servers/server1/mods}

^{28.05 11:11:56 [server] INFO Forge Mod Loader version @MAJOR@.@MINOR@.@REV@.@BUILD@ for Minecraft @MCVERSION@ loading}

[N0vaGam3r]

Backup your world and re-install the tekkit server files.