Hi!
I just realized that also wall switches and window switches do not work (see log at the end of the post).
So this means the problem may be homegear? Should not be a problem. However, if it is easier for you I also could send you a dump of the homegear database for example. 
17:49:06.747 [TRACE] [nicator.server.BinRpcCallbackHandler] - Event BinRpcMessage: system.multicall()
[
{
methodName=event
params=
[
RF-default
LTK0050475:0
RSSI_DEVICE
-69
]
}
]
17:49:06.757 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Integer) value '-69' for 'LTK0050475:0#RSSI_DEVICE' from gateway with id 'default'
17:49:06.763 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'LTK0050475:0#RSSI_DEVICE'
17:49:06.767 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'LTK0050475:0#RSSI'
17:49:06.771 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'LTK0050475:0#SIGNAL_STRENGTH'
17:49:06.840 [TRACE] [nicator.server.BinRpcCallbackHandler] - Event BinRpcMessage: system.multicall()
[
{
methodName=event
params=
[
RF-default
LTK0050475:1
INSTALL_TEST
true
]
}
{
methodName=event
params=
[
RF-default
LTK0050475:1
PRESS_SHORT
true
]
}
]
17:49:06.846 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Boolean) value 'true' for 'LTK0050475:1#INSTALL_TEST' from gateway with id 'default'
17:49:06.849 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'LTK0050475:1#INSTALL_TEST'
17:49:06.857 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Boolean) value 'true' for 'LTK0050475:1#PRESS_SHORT' from gateway with id 'default'
17:49:06.861 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'LTK0050475:1#PRESS_SHORT'
17:49:06.864 [DEBUG] [ematic.internal.misc.DelayedExecuter] - Delaying event for 2.0 seconds: 'LTK0050475:1#PRESS_SHORT'
17:49:08.817 [TRACE] [nicator.server.BinRpcCallbackHandler] - Event BinRpcMessage: system.multicall()
[
{
methodName=event
params=
[
RF-default
MEQ0907189:0
RSSI_DEVICE
-58
]
}
]
17:49:08.819 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Integer) value '-58' for 'MEQ0907189:0#RSSI_DEVICE' from gateway with id 'default'
17:49:08.824 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:0#RSSI_DEVICE'
17:49:08.828 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:0#RSSI'
17:49:08.832 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:0#SIGNAL_STRENGTH'
17:49:08.868 [DEBUG] [ematic.internal.misc.DelayedExecuter] - Executing delayed event for 'LTK0050475:1#PRESS_SHORT'
17:49:08.878 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'LTK0050475:1#PRESS_SHORT'
17:49:08.911 [TRACE] [nicator.server.BinRpcCallbackHandler] - Event BinRpcMessage: system.multicall()
[
{
methodName=event
params=
[
RF-default
MEQ0907189:1
LOWBAT
false
]
}
{
methodName=event
params=
[
RF-default
MEQ0907189:1
STATE
true
]
}
]
17:49:08.913 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Boolean) value 'false' for 'MEQ0907189:1#LOWBAT' from gateway with id 'default'
17:49:08.916 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:1#LOWBAT'
17:49:08.919 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Boolean) value 'true' for 'MEQ0907189:1#STATE' from gateway with id 'default'
17:49:08.926 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:1#STATE'
17:49:10.431 [TRACE] [nicator.server.BinRpcCallbackHandler] - Event BinRpcMessage: system.multicall()
[
{
methodName=event
params=
[
RF-default
MEQ0907189:1
LOWBAT
false
]
}
{
methodName=event
params=
[
RF-default
MEQ0907189:1
STATE
false
]
}
]
17:49:10.433 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Boolean) value 'false' for 'MEQ0907189:1#LOWBAT' from gateway with id 'default'
17:49:10.437 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:1#LOWBAT'
17:49:10.443 [DEBUG] [ternal.communicator.HomematicGateway] - Received new (Boolean) value 'false' for 'MEQ0907189:1#STATE' from gateway with id 'default'
17:49:10.449 [WARN ] [ematic.handler.HomematicThingHandler] - Channel not found for datapoint 'MEQ0907189:1#STATE'