Write in root on NFS disk?

[Conny Enström]

I have a NFS Raid-1 shared and mounted NFS disk like this on the server:
/etc/exportfs
/mnt/md0 *(rw,async,no_subtree_check,no_root_squash,fsid=1)

I have also tried to export it like this: /mnt/md0 
*(rw,sync,no_subtree_check)

I had 2 disks mounted exact the same before and had no problem with 
copying files to the root of the disks.

Mounted on the client with:
fstab
192.168.0.113:/mnt/md0 /media/raid1 nfs auto 0 0

I can't write or copy any files in the root of the disk,I can create a 
folder without problem
What is wrong with the config?

Conny