rsync error: error in socket IO (code 10) at io.c(423)

[Marcus Forthuber]

Hi guys,
anyone ever seen that kind of error?
ESNW01:rsync -vruzt --delete 10.1.1.10::SITE/aodat vol1:/progstest
Loading module RSYNC.NLM
  RSync 2.5.5
  Version 2.55    July 10, 2003
  Copyright 2003 Andrew Tridgell, Paul Mackerras, Martin Pool
       (1013) read_timeout: Error peer socket closed fd = 103
(1013) rsync error: error in socket IO (code 10) at io.c(423)

Trying to sync a directory between two NW 5.1 Sp6 server.
Any suggestions are welcome
thanks a lot
 
Marcus