I recently installed jEdit 4.2 final on my Kubuntu 6.04 (Dapper Drake) system, with java version 1.4.2-02 installed. The first thing I wanted to do was to enable some plugins, but when trying to install them through plugin manager (any plugin, multiple number of tries), I get a message box saying "An I/O error occurred (Connection refused)" and the messages below in the console window in which I started jEdit. My system is connected to the internet through an router using NAT, with no restrictions, firewalls or proxies. I have no problems whatsover with my internet connection other than this. Any ideas? Messages in Console Window: [error] Roster$Install: java.net.ConnectException: Connection refused [error] Roster$Install: at java.net.PlainSocketImpl.socketConnect(Native Method) [error] Roster$Install: at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305) [error] Roster$Install: at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171) [error] Roster$Install: at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158) [error] Roster$Install: at java.net.Socket.connect(Socket.java:452) [error] Roster$Install: at java.net.Socket.connect(Socket.java:402) [error] Roster$Install: at sun.net.NetworkClient.doConnect(NetworkClient.java:139) [error] Roster$Install: at sun.net.www.http.HttpClient.openServer(HttpClient.java:402) [error] Roster$Install: at sun.net.www.http.HttpClient.openServer(HttpClient.java:618) [error] Roster$Install: at sun.net.www.http.HttpClient.(HttpClient.java:306) [error] Roster$Install: at sun.net.www.http.HttpClient.(HttpClient.java:267) [error] Roster$Install: at sun.net.www.http.HttpClient.New(HttpClient.java:339) [error] Roster$Install: at sun.net.www.http.HttpClient.New(HttpClient.java:320) [error] Roster$Install: at sun.net.www.http.HttpClient.New(HttpClient.java:315) [error] Roster$Install: at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:521) [error] Roster$Install: at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:498) [error] Roster$Install: at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:626) [error] Roster$Install: at org.gjt.sp.jedit.pluginmgr.Roster$Install.download(Roster.java:417) [error] Roster$Install: at org.gjt.sp.jedit.pluginmgr.Roster$Install.runInWorkThread(Roster.java:314) [error] Roster$Install: at org.gjt.sp.jedit.pluginmgr.Roster.performOperationsInWorkThread(Roster.java:82) [error] Roster$Install: at org.gjt.sp.jedit.pluginmgr.PluginManagerProgress$RosterThread.run(PluginManagerProgress.java:181)