Ipad air 2 Plex APP is bad with plex WD cloud home!



Why Can't my Ipad plex app play video from my plex media server that is on my WD cloud home 4To? I hardly can play a video, if I'm lucky !
Is there a problem with the apple plex app compatibility if I use WD cloud home for server?
because on my samsung TV , The plex app do good !!!