problem with NFS

[Luca Ferrari <fluca1978@infinito.it>]

Hi all,
I've got a suse linux server where I exported a root-created directory as 
follows:

server:~ # ls -ald /vol2/backup_opensco/
drwxr-xr-x  2 root root 48 Sep 15 17:23 /vol2/backup_opensco/
server:~ # cat /etc/exports
/vol2/backup_opensco 192.168.201.63(rw,sync)


and an old opensco server (192.168.201.63) that should be able to mount the 
exported directory. Now I execute the following command on the sco server:
# mount -f NFS 192.168.201.1:/vol2/backup_opensco /mnt
# mount
/ on /dev/root read/write on Fri Sep 15 15:04:32 2006
/stand on /dev/boot read only on Fri Sep 15 15:04:33 2006
/mnt on 192.168.201.1:/vol2/backup_opensco read/write on Fri Sep 15 17:36:17

Now the filesystem is mounted in read-write mode, and it belongs to root: 
# ls -ald /mnt
drwxr-xr-x   2 root     root          48 Sep 15 16:23 /mnt

but I cannot write to it!

# cd /mnt
# echo "ciao" > ciao.txt
ciao.txt: cannot create

Anyone can explain me why? I guess the NFS exporting is right, and also the 
mounting, but it looks like there's a problem with owner and group. Any idea?

Thanks,
Luca