Ovirt devel - Sep 2009 - ovirt node 1.0.3 nfs error

Good Morning,
I have successfully deployed Ovirt manager and 1 node (1.03 version).
All networks interfaces work fine.
When I try to configure a NFS storage, the web interface gives a  
timeout agent error and on the node in /var/log/messages I read the  
following lines:

FATAL: Error inserting nfsd  
(/lib/modules/2.6.30.5-43.fc11.x86_64/kernel/fs/nfsd/nfsd.ko): Unknown  
symbol in module, or unknown parameter (see dmesg)
FATAL: Error running install command for nfsd
Starting NFS services:  exportfs: can't open /var/lib/nfs/rmtab for reading


in dmesg:
nfsd: Unknown symbol exportfs_decode_fh
nfsd: Unknown symbol exportfs_encode_fh
nfsd: Unknown symbol exportfs_decode_fh
nfsd: Unknown symbol exportfs_encode_fh