Can't connect over NFS

I have a mediaplayer that I want to connect to my MBL over NFS. I need both read and write permission since the mediaplayer creates folders when scraping. How can I do this? I can see the NAS from the mediaplayer but when I connect it says “connecting” and nothing more happens. SAMBA works fine but is too slow for HD videos. I can’t find any NFS settings at all in the web gui(:

Reset both the media player and the drive