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java.lang.NullPointerException: 	at java.util.Properties$LineReader.readLine(Unknown Source)	at java.util.Properties.load0(Unknown Source)	at java.util.Properties.load(Unknown Source)	at pl.mn.communicator.SimplePropertiesGGConfiguration.createProperties(SimplePropertiesGGConfiguration.java:46)	at pl.mn.communicator.AbstractGGPropertiesConfiguration.(AbstractGGPropertiesConfiguration.java:48)	at pl.mn.communicator.SimplePropertiesGGConfiguration.(SimplePropertiesGGConfiguration.java:38)	at pl.mn.communicator.SimplePropertiesGGConfiguration.createSimplePropertiesGGConfiguration(SimplePropertiesGGConfiguration.java:52)	at pl.mn.communicator.SessionFactory.createSession(SessionFactory.java:39)	at org.jivesoftware.openfire.gateway.protocols.gadugadu.GaduGaduSession.logIn(GaduGaduSession.java:73)	at org.jivesoftware.openfire.gateway.protocols.gadugadu.GaduGaduTransport.registrationLoggedIn(GaduGaduTransport.java:88)	at org.jivesoftware.openfire.gateway.BaseTransport.processPacket(BaseTransport.java:360)	at org.jivesoftware.openfire.gateway.BaseTransport.processPacket(BaseTransport.java:165)	at org.jivesoftware.openfire.component.InternalComponentManager$RoutableComponent.process(InternalComponentManager.java:497)	at org.jivesoftware.openfire.spi.RoutingTableImpl.routePacket(RoutingTableImpl.java:234)	at org.jivesoftware.openfire.roster.Roster.broadcastPresence(Roster.java:587)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.broadcastUpdate(PresenceUpdateHandler.java:281)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:122)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:110)	at org.jivesoftware.openfire.handler.PresenceUpdateHandler.process(PresenceUpdateHandler.java:174)	at org.jivesoftware.openfire.PresenceRouter.handle(PresenceRouter.java:130)	at org.jivesoftware.openfire.PresenceRouter.route(PresenceRouter.java:67)	at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:75)	at org.jivesoftware.openfire.net.StanzaHandler.processPresence(StanzaHandler.java:321)	at org.jivesoftware.openfire.net.ClientStanzaHandler.processPresence(ClientStanzaHandler.java:84)	at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:245)	at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:167)	at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandler.java:132)	at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived(AbstractIoFilterChain.java:570)	at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:299)	at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:53)	at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:648)	at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimpleProtocolDecoderOutput.java:58)	at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:162)	at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(AbstractIoFilterChain.java:299)	at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilterChain.java:53)	at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceived(AbstractIoFilterChain.java:648)	at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java:240)	at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(ExecutorFilter.java:284)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)