新手求教180架设问题.

火还着着

C:\Users\Administrator.PC-20130409RMZD>F:\108playms\启动服务端.exe
java.lang.NoClassDefFoundError: org/apache/log4j/Logger
        at tools.MaplePacketCreator.<clinit>(MaplePacketCreator.java:78)
        at server.Start.run(Start.java:51)
        at server.Start.main(Start.java:213)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Sourc
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
        at com.exe4j.runtime.WinLauncher.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 9 more


只是什么问题呢？第一步打开服务端就出现这个问题了。求指教！