vFiler nfs Export mount permission

I created a vFiler with two protocols enabled export (NFS / CIFS), then I added a volume and mounted the same on a linux client, as a root user, with the following options: mount -t nfs NetAppipaddress:vol/vol_1  /mountpoint -o rw

unfortunately I can not write, error is permission denied i can only read the content

What did I do wrong?