Hi Mario,
The error code you get has nothing to do between the client code level and the 
server code level.
Someone have access the TSM Client Node and backup data with a never version of 
TSM Client then 5.5.1.0

Upgrade your TSM Client to a never version such 5.5.4.0.
You can download the latest TSM Client version from 
ftp://ftp.software.ibm.com/storage/tivoli-storage-management/

Best Regards
Christian Svensson

Cell: +46-70-325 1577
E-mail: Christian.Svensson AT cristie DOT se
Skype: cristie.christian.svensson
Supported Platform for CPU2TSM:: 
http://www.cristie.se/cpu2tsm-supported-platforms

________________________________________
Från: ADSM: Dist Stor Manager [ADSM-L AT VM.MARIST DOT EDU] för Mario 
Behring [mariobehring AT YAHOO DOT COM]
Skickat: den 14 januari 2010 12:15
Till: ADSM-L AT VM.MARIST DOT EDU
Ämne: Downlevel client code message

Hi all,

I am getting the error message below on a Linux client. TSM Server is 5.5.0.0 
running on a Windows 2003 box. The message itself makes no sense, as it says 
the the client code version is BELOW the server....and it´s not. There are 
other TSM clients running 5.5.1.0...



IBM Tivoli Storage Manager
Command Line Backup/Archive Client Interface
  Client Version 5, Release 5, Level 1.0
  Client date/time: 01/13/2010 17:58:43
  Copyright by IBM Corporation and other(s) 1990, 2008. All Rights Reserved.

Node Name: <node name>
ANS1357S Session rejected: Downlevel client code version


Any ideas?

Mario