here's the output log:
[INFO] ModLoader Server 1.1 Initializing...
[INFO] Mod Loaded: mod_IC2 v1.64
[INFO] ModLoaderMP 1.1 Initialized
[INFO] Starting minecraft server version 1.1
[INFO] Loading properties
[INFO] Starting Minecraft server on *:25565
[INFO] Preparing level "world"
[INFO] Default game type: 0
[INFO] Preparing start region for level 0
[INFO] Done (500701000ns)! For help, type "help" or "?"
[INFO] ddriver360 [/5.34.248.131:59173] logged in with entity id 265 at (-27.962119779326574, 64.0, 26.945199582733803)
[INFO] ddriver360 joined with mod_ModLoaderMp 1.0.0, mod_TooManyItems 1.1 2012-01-12a, mod_IC2 v1.64
[SEVERE] Unexpected exception
java.lang.NoSuchMethodError: ug.getBlockReachDistance()D
at lf.a(NetServerHandler.java:298)
at kf.a(SourceFile:43)
at pd.b(SourceFile:271)
at lf.a(NetServerHandler.java:47)
at ew.a(SourceFile:108)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:446)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:346)
at cz.run(SourceFile:465)