PVR-WMC Recorded TV folder not found

Hello,
I connected successfully mykodi17RC2 pvr-wmc to a serverwmc on a Win7. It seems that kodi (on QNAP NAS installed) has problems to access the folder of recorded TV which is specified in serverwmc:
– I get an error message on Kodi start “recorded TV folder not found”
– I can see the recorded videos but no stream can be started
– The log of serverwmc shows that a stream was created but a problem from client

2017/01/07 18:35:02.059 Finished request OpenLiveStream in 4,77s
2017/01/07 18:35:03.089 Received client request: QNAPTilly|192.168.0.30|StreamStartError|smb://feuersau:********@HÖLLENRECHNER/Users/Public/Recorded TV/TempSWMC/LiveTV_Kodi^QNAPTilly_DVB-S_1_2017_01_07_18_34_57.ts
2017/01/07 18:35:03.089 StreamStartError> client ‘Kodi^QNAPTilly’ reports error opening stream, will close stream down
2017/01/07 18:35:03.089 StreamStartError> client ‘Kodi^QNAPTilly’ path to stream file: ‘smb://feuersau:********@HÖLLENRECHNER/Users/Public/Recorded TV/TempSWMC/LiveTV_Kodi^QNAPTilly_DVB-S_1_2017_01_07_18_34_57.ts’
2017/01/07 18:35:03.089 StreamStartError> client ‘Kodi^QNAPTilly’ calling CloseStream

The foldername was automatically filled during setup routine of serverwmc: “\\HÖLLENRECHNER\Users\Public\Recorded TV” (derived from . I already have entered user/password in serverwmc.

Could someone help, please?

regards,
André