Robert,

Try the ideas outlined in this IBM TechNote:

http://www-1.ibm.com/support/docview.wss?uid=swg21200586

Del

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"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 12/26/2006 
02:42:06 AM:

> When trying to backup a Sql server 2000 Sp4  with TDP for Microsoft 
> Sql server (version 5.2.1.) on a Windows Server 2003 Entreprise 
> Edition SP1, I got the following error: 
> 
> Backup of SPS01_Config_db failed.
> 
> ACO5400E The Virtual Device Interface is not registered with the 
> Common Object Model.
> 
> I find an old link about this :  http://support.microsoft.
> com/default.aspx?scid=kb;en-us;323602&Product=sql2k
> But didn?t find those parameters on my registry  ????
> Help will be really appreciate ?..
> 
> T.I.A Regards
> 
> Robert Ouzen