Ok. I just renamed your file to:
house.items
and copied it to my Dev environments directory:
OH/configurations/items/foo.items
and then restarted openHAB. I can see a bunch of the normal stuff in the logs:
16:29:19.991 DEBUG o.o.b.m.internal.MiosActivator[:36]- MiOS binding has been started
16:29:20.001 DEBUG o.o.b.m.i.MiosBindingProviderImpl[:92]- setItemRegistry: called
16:29:20.002 DEBUG o.o.m.i.i.GenericItemProvider[:334]- Start processing binding configuration of Item 'ZWaveId (Type=NumberItem, State=Uninitialized)' with 'MiosBindingProviderImpl' reader.
16:29:20.004 DEBUG o.o.b.m.i.c.MiosBindingConfig[:188]- Successfully loaded UPnP Service Aliases from 'org/openhab/binding/mios/internal/config/ServiceAliases.properties', entries '87'
16:29:20.005 DEBUG o.o.b.m.i.c.MiosBindingConfig[:205]- Successfully loaded Device Parameter defaults from 'org/openhab/binding/mios/internal/config/DeviceDefaults.properties', entries '14'
16:29:20.005 DEBUG o.o.b.m.i.MiosBindingProviderImpl[:139]- processBindingConfiguration: Adding Item 'ZWaveId' Binding 'unit:house,device:1/id', from 'foo.items'
16:29:20.006 DEBUG o.o.m.i.i.GenericItemProvider[:334]- Start processing binding configuration of Item 'ZWaveDeviceStatus (Type=StringItem, State=Uninitialized)' with 'MiosBindingProviderImpl' reader.
16:29:20.006 DEBUG o.o.b.m.i.MiosBindingProviderImpl[:139]- processBindingConfiguration: Adding Item 'ZWaveDeviceStatus' Binding 'unit:house,device:1/status,in:MAP(miosStatusIn.map)', from 'foo.items'
16:29:20.006 DEBUG o.o.m.i.i.GenericItemProvider[:334]- Start processing binding configuration of Item 'ZWaveUse45 (Type=StringItem, State=Uninitialized)' with 'MiosBindingProviderImpl' reader.
16:29:20.007 DEBUG o.o.b.m.i.MiosBindingProviderImpl[:139]- processBindingConfiguration: Adding Item 'ZWaveUse45' Binding 'unit:house,device:1/service/urn:micasaverde-com:serviceId:ZWaveNetwork1/Use45', from 'foo.items'
16:29:20.007 DEBUG o.o.m.i.i.GenericItemProvider[:334]- Start processing binding configuration of Item 'ZWaveUseMR (Type=StringItem, State=Uninitialized)' with 'MiosBindingProviderImpl' reader.
...
16:29:20.264 DEBUG o.o.m.i.i.GenericItemProvider[:334]- Start processing binding configuration of Item 'SceneAlarmWakeUp (Type=StringItem, State=Uninitialized)' with 'MiosBindingProviderImpl' reader.
16:29:20.264 DEBUG o.o.b.m.i.MiosBindingProviderImpl[:139]- processBindingConfiguration: Adding Item 'SceneAlarmWakeUp' Binding 'unit:house,scene:21/status,command:,in:MAP(miosStatusIn.map)', from 'foo.items'
16:29:20.264 DEBUG o.o.m.i.i.GenericItemProvider[:334]- Start processing binding configuration of Item 'SceneAlarmWakeUpActive (Type=ContactItem, State=Uninitialized)' with 'MiosBindingProviderImpl' reader.
16:29:20.265 DEBUG o.o.b.m.i.MiosBindingProviderImpl[:139]- processBindingConfiguration: Adding Item 'SceneAlarmWakeUpActive' Binding 'unit:house,scene:21/active,in:MAP(miosSceneActiveIn.map)', from 'foo.items'
16:29:20.267 DEBUG o.o.a.m.internal.MiosActivator[:33]- MiOS Action has been started.
16:29:20.270 DEBUG o.o.b.m.internal.MiosBinding[:144]- allBindingsChanged: start provider 'org.openhab.binding.mios.internal.MiosBindingProviderImpl@6d70f305'
16:29:20.271 DEBUG o.o.b.m.internal.MiosBinding[:172]- registerWatch: start miosProvider 'org.openhab.binding.mios.internal.MiosBindingProviderImpl@6d70f305', itemName 'SceneLampsOn1'
16:29:20.271 DEBUG o.o.b.m.internal.MiosBinding[:172]- registerWatch: start miosProvider 'org.openhab.binding.mios.internal.MiosBindingProviderImpl@6d70f305', itemName 'VacationGhostOnTime4'
16:29:20.271 DEBUG o.o.b.m.internal.MiosBinding[:172]- registerWatch: start miosProvider 'org.openhab.binding.mios.internal.MiosBindingProviderImpl@6d70f305', itemName 'InfoViewerId'
16:29:20.271 DEBUG o.o.b.m.internal.MiosBinding[:172]- registerWatch: start miosProvider 'org.openhab.binding.mios.internal.MiosBindingProviderImpl@6d70f305', itemName 'RFXRemoteL21000508CId'
...
16:29:21.884 DEBUG o.o.b.m.i.MiosUnitConnector[:676]- processResponse: success! loadTime=1426461842, dataVersion=461843268 devices(126) scenes(94) rooms(0) sections(0)
16:29:21.888 DEBUG o.o.b.m.internal.MiosBinding[:482]- internalPropertyUpdate: BOUND (Full) Updating 'ZWaveDeviceStatus {mios="unit:house,device:1/status"}' to 'NONE', was 'Uninitialized'
16:29:21.891 DEBUG o.o.b.m.internal.MiosBinding[:482]- internalPropertyUpdate: BOUND (Full) Updating 'ZWaveLastUpdate {mios="unit:house,device:1/service/urn:micasaverde-com:serviceId:ZWaveNetwork1/LastUpdate"}' to '2015-03-15T16:24:05', was 'Uninitialized'
16:29:21.892 DEBUG o.o.b.m.internal.MiosBinding[:482]- internalPropertyUpdate: BOUND (Full) Updating 'ZWaveNetStatusID {mios="unit:house,device:1/service/urn:micasaverde-com:serviceId:ZWaveNetwork1/NetStatusID"}' to '1', was 'Uninitialized'
16:29:21.893 DEBUG o.o.b.m.internal.MiosBinding[:482]- internalPropertyUpdate: BOUND (Full) Updating 'ZWaveNetStatusText {mios="unit:house,device:1/service/urn:micasaverde-com:serviceId:ZWaveNetwork1/NetStatusText"}' to 'OK', was 'Uninitialized'
...
(large sections clipped, since it’s long)
So it’s definitely working. It’ll be worth double-checking the location of your Items file, since it looks like openHAB isn’t picking it up.