Installation plugin error

Sorry for my english !! - I have a problem… When i install a plugin, the installation is OK… but in “plugins” It does not appear.

I install Oracle Java 8, 7 but is the same… dont work…

I Paste some information…

Openfire 3.9.3

Ubuntu 12.04
Webmin (apache, mysql, etc)

Database installation over Mysql

Ambiente

Versión de Java: 1.6.0_33 Sun Microsystems Inc. – OpenJDK Server VM

Servidor de Aplicaciones: jetty/7.x.y-SNAPSHOT

Host Name: webserver

SO / Hardware: Linux / i386

Error Log:

2014.12.04 13:36:44 org.jivesoftware.openfire.container.AdminConsolePlugin - Could not start admin conosle server

java.net.BindException: La dirección ya se está usando

at sun.nio.ch.Net.bind0(Native Method)

at sun.nio.ch.Net.bind(Net.java:436)

at sun.nio.ch.Net.bind(Net.java:428)

at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)

at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)

at org.eclipse.jetty.server.nio.SelectChannelConnector.open(SelectChannelConnector .java:172)

at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:300)

at org.eclipse.jetty.server.nio.SelectChannelConnector.doStart(SelectChannelConnec tor.java:249)

at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java :59)

at org.eclipse.jetty.server.Server.doStart(Server.java:272)

at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java :59)

at org.jivesoftware.openfire.container.AdminConsolePlugin.startup(AdminConsolePlug in.java:181)

at org.jivesoftware.openfire.container.AdminConsolePlugin.initializePlugin(AdminCo nsolePlugin.java:216)

at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java :483)

at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java :80)

at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManag er.java:1074)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

Advertencia Log

java.net.BindException: La dirección ya se está usando

at sun.nio.ch.Net.bind0(Native Method)

at sun.nio.ch.Net.bind(Net.java:436)

at sun.nio.ch.Net.bind(Net.java:428)

at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)

at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)

at org.eclipse.jetty.server.nio.SelectChannelConnector.open(SelectChannelConnector .java:172)

at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:300)

at org.eclipse.jetty.server.nio.SelectChannelConnector.doStart(SelectChannelConnec tor.java:249)

at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java :59)

at org.eclipse.jetty.server.Server.doStart(Server.java:272)

at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java :59)

at org.jivesoftware.openfire.container.AdminConsolePlugin.startup(AdminConsolePlug in.java:181)

at org.jivesoftware.openfire.container.AdminConsolePlugin.initializePlugin(AdminCo nsolePlugin.java:216)

at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java :483)

at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java :80)

at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManag er.java:1074)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)

In the web he says that the problem is the version of java. But already reinstall java, openfire 3.9.3 and it follows the same problem. I need help please !