Error loading plugin: plugins\xmldebugger

OLD trouble

2015.04.15 18:50:58 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: D:!OpenFire\plugins\xmldebugger
java.lang.NoClassDefFoundError: org/apache/mina/common/IoFilter
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java :414)
at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java :76)
at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManag er.java:1068)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301 (Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknow n Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.mina.common.IoFilter
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 java.lang.ClassLoader.loadClass(Unknown Source)
… 14 more