Hello, I updated my server to the 1.4.6 craftbukkit version and the console showed no errors that that could harm the server in any way but for some reason no one can log into the server it shows an error like this 2012-12-21 08:00:36 [SEVERE] Exception in thread "Listen thread" 2012-12-21 08:00:36 [SEVERE] java.lang.RuntimeException: Cannot find class NetLoginHandler 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.utility.CachedPackage.getPackageClass(CachedPackage.java:43) 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.utility.MinecraftReflection.getMinecraftClass(MinecraftReflection.java:517) 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.utility.MinecraftReflection.getNetLoginHandlerClass(MinecraftReflection.java:292) 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.utility.MinecraftReflection.isLoginHandler(MinecraftReflection.java:196) 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.injector.player.InjectedServerConnection$1.onInserting(InjectedServerConnection.java:232) 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.injector.player.ReplacedArrayList.add(ReplacedArrayList.java:80) 2012-12-21 08:00:36 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServerConnectionThread.a(DedicatedServerConnectionThread.java:104) 2012-12-21 08:00:36 [SEVERE] at net.minecraft.server.v1_4_6.DedicatedServerConnectionThread.run(DedicatedServerConnectionThread.java:88) 2012-12-21 08:00:36 [SEVERE] Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_4_6.NetLoginHandler 2012-12-21 08:00:36 [SEVERE] at org.bukkit.plugin.java.PluginClassLoader.findClass0(PluginClassLoader.java:70) 2012-12-21 08:00:36 [SEVERE] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:53) 2012-12-21 08:00:36 [SEVERE] at java.lang.ClassLoader.loadClass(ClassLoader.java:423) 2012-12-21 08:00:36 [SEVERE] at java.lang.ClassLoader.loadClass(ClassLoader.java:356) 2012-12-21 08:00:36 [SEVERE] at com.comphenix.protocol.utility.CachedPackage.getPackageClass(CachedPackage.java:35) 2012-12-21 08:00:36 [SEVERE] ... 7 more but i dont know why? if anyone could help i would be so pleased! Dont worry I got help from another post! EDIT by Moderator: merged posts, please use the edit button instead of double posting.