nfs server on debian 30r1

Hi,

I try to configure a NFS server on debian 30r1 and have some problems
:

1° At client connection it says in /var/log/messages " rpc.mountd:
getfh failed: Function not implemented"

2° pmap_dump says :
100000 2 tcp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 1025 status
100024 1 tcp 1024 status
100005 1 udp 1026 mountd
100005 1 tcp 1025 mountd
100005 2 udp 1026 mountd
100005 2 tcp 1025 mountd

3° I've configured /etc/exports, /etc/hosts.[allow, deny] correctly (I
hope)

4° I have an entry "nfs 100003 nfsprog" in /etc/rpc file

Can you say me, where I have to look to make it work ?

Thanks, Jacek