Sharing NFS-mounted volume through netatalk

Here's the situation... I have some NAS units (Iomega NAS 100d) that I
need to attach some Mac OS 9 machines to. I haven't heard back from
Iomega yet, and I need to get this done asap.

What I tried:
1. mount the NAS on a linux server
2. enter the volume into AppleVolumes.default:
/mnt/iomega1/ "Iomega1" dbpath:/var/run/netatalk
3. just because of problems I was having, I even did:
chmod -R 777 /mnt/iomega1
chown -R myuser.mygroup /mnt/iomega1
chmod -R 777 /var/run/netatalk
chown -R myuser.mygroup /var/run/netatalk
4. Log into the server with OS 9 - the share shows up.
5. when I try to copy a file to an empty volume I get an
"error of type -50"

File permissions are fine, and the "Home Directory" share doesn't have
any problems at all. Is it just that netatalk cannot correctly share an
NFS-mounted dir, or am I missing something?

TIA