Stuttering Video with RPi 2 using PVR client

hallo I have stuttering video issues while streaming h264 using PVR simple client.
I have RPi 2 so with 1 GB ram and I’ve modified the advancedsettings.xml as per kodi wiki page (below)

anyway I still have the same problem (seems like the advanced settings doesn work) and the video starts initially stuttering then blocks forever.

any idea?

advancedsettings.xml located in /home/osmc/.kodi/userdata/