[kubuntu] Integration of smartphone in Dolphin via KDE Coect is not working properly

Hi there,

unfortunately, the integration of my smartphone in Dolphin via KDE Coect isn't working properly anymore.
I even deinstalled and reinstalled the package on my notebook and the app on my smartphone and rebooted both devices many times without any success.
There is installed KDE Coect Version: 0.8-0ppa3+pkg7~ubuntu14.10.1; Keel Version: 3.13.0-87-generic.
I can send files from my smartphone without any problems to my notebook. Furthermore, on my notebook, I can choose a file, right click on it and choose the option Send to (Smartphone) via KDE Coect. The chosen file will be send without any problems to my smartphone.
Also Ping works in both directions (from smartphone to notebook and from notebook to smartphone); even the touchpad on my smartphone (which allows me to move the mouse on my desktop via my smartphone) works fine; also the shared clipboard!

But everytime I want to browse my Smartphone using Dolphin - as I did before without any problems - , I'm getting the following error: Failed to mount filesystem: device not responding.

Anyone any idea how I can browse my smartphone via KDE Coect in Dolphin again as it used to be before?

Thanks in advance!
Chipy