Mounting NFS under Android

I'm mounting an nfs share under Android using busybox and the script below:

  #!/system/bin/sh
  mount -o remount,rw /
  mkdir -p /mnt/nfs/test1
  chmod -R 0777 /mnt/nfs/test1
  chown shell.shell /mnt/nfs/test1
  /system/xbin/busybox mount -o nolock,rw,users,exec -t nfs 192.168.1.200:/c/media /mnt/nfs/test1
  mount -o remount,ro /

The share appears to mount fine. I can browse it from my network, I can ssh into the system and access the contents as root. However Android apps being run on this system can see the directories, but they all list as empty. How can I fix this?