I managed to get it working by changing some code: \Root\usr\lib\enigma2\python\Plugins\Extensions\We atherPlugin\plugin.pyo --> "%H:%M:%S" to "%H.%M.%S" and "%H:%M",c to "%H.%M",c. Also \Root\usr\lib\enigma2\python\Components\Sources\MS NWeather.pyo --> "%H:%M:%S" to "%H.%M.%S" and "%H:%M",c to "%H.%M",c.
Maybe someone can change the source code by adding OR sentence, for example "%H:%M:%S" OR "%H.%M.%S" Is that possible ?