Communication Error to homegear

Hello,

I am running openhab 1.8.3 with homegear 0.7.0 on a elderly Intel Atom Board. OS is Ubuntu 14.4.
Everything war running fine for month until yesterday.

Yesterday was a restart of the hosting Server needed. Since that restart was the communication between openhab and homegear buggy.
I get Updates from all Sensors (Temparature, Humidity), but cannot set any Value with openhab.
With all events I click on the UI this Errormessage came up in the log:

2017-07-19 15:11:28.020 [ERROR] [.b.h.i.c.HomematicCommunicator] - -100 No answer from device. (sending BinRpcRequest[methodName=setValue,args={LEQ0001911:2,SET_TEMPERATURE,21.0}])
org.openhab.binding.homematic.internal.communicator.client.HomematicClientException: -100 No answer from device. (sending BinRpcRequest[methodName=setValue,args={LEQ0001911:2,SET_TEMPERATURE,21.0}])
at org.openhab.binding.homematic.internal.communicator.client.BinRpcClient.sendMessage(BinRpcClient.java:224) ~[bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.client.BinRpcClient.setDatapointValue(BinRpcClient.java:158) ~[bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.client.BaseHomematicClient.setDatapointValue(BaseHomematicClient.java:72) ~[bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.HomematicPublisher.sendToClient(HomematicPublisher.java:78) ~[bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.HomematicPublisher.execute(HomematicPublisher.java:65) ~[bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.HomematicCommunicator.publishToHomematicServer(HomematicCommunicator.java:317) [bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.HomematicCommunicator.receiveType(HomematicCommunicator.java:278) [bundlefile:na]
at org.openhab.binding.homematic.internal.communicator.HomematicCommunicator.receiveCommand(HomematicCommunicator.java:245) [bundlefile:na]
at org.openhab.binding.homematic.internal.bus.HomematicBinding.internalReceiveCommand(HomematicBinding.java:168) [bundlefile:na]
at org.openhab.core.binding.AbstractBinding.receiveCommand(AbstractBinding.java:97) [org.openhab.core_1.8.3.jar:na]
at org.openhab.core.events.AbstractEventSubscriber.handleEvent(AbstractEventSubscriber.java:42) [org.openhab.core_1.8.3.jar:na]
at org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197) [org.eclipse.equinox.event_1.2.200.v20120522-2049.jar:na]
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) [org.eclipse.equinox.event_1.2.200.v20120522-2049.jar:na]
at org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) [org.eclipse.equinox.event_1.2.200.v20120522-2049.jar:na]
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) [org.eclipse.osgi_3.8.2.v20130124-134944.jar:na]
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) [org.eclipse.osgi_3.8.2.v20130124-134944.jar:na]
at org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) [org.eclipse.equinox.event_1.2.200.v20120522-2049.jar:na]
at org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) [org.eclipse.equinox.event_1.2.200.v20120522-2049.jar:na]
at org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) [org.eclipse.equinox.event_1.2.200.v20120522-2049.jar:na]
at org.openhab.core.internal.events.EventPublisherImpl.sendCommand(EventPublisherImpl.java:56) [org.openhab.core_1.8.3.jar:na]
at org.openhab.ui.webapp.internal.servlet.CmdServlet.service(CmdServlet.java:95) [org.openhab.ui.webapp_1.8.3.jar:na]
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.service(ServletRegistration.java:61) [org.eclipse.equinox.http.servlet_1.1.300.v20120522-1841.jar:na]
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:128) [org.eclipse.equinox.http.servlet_1.1.300.v20120522-1841.jar:na]
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:60) [org.eclipse.equinox.http.servlet_1.1.300.v20120522-1841.jar:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) [javax.servlet_3.0.0.v201112011016.jar:na]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598) [org.eclipse.jetty.servlet_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486) [org.eclipse.jetty.servlet_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413) [org.eclipse.jetty.servlet_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.Server.handle(Server.java:350) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:454) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:890) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:944) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:630) [org.eclipse.jetty.http_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230) [org.eclipse.jetty.http_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) [org.eclipse.jetty.server_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) [org.eclipse.jetty.io_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) [org.eclipse.jetty.io_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) [org.eclipse.jetty.util_8.1.3.v20120522.jar:8.1.3.v20120522]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) [org.eclipse.jetty.util_8.1.3.v20120522.jar:8.1.3.v20120522]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91]
Caused by: java.io.IOException: -100 No answer from device.
at org.openhab.binding.homematic.internal.communicator.client.BinRpcClient.sendMessage(BinRpcClient.java:210) ~[bundlefile:na]
… 47 common frames omitted

Can anybody help here?

Thanks a lot!
Andre