MCMS Site Deployment API

Hi,

I'm currently trying to move a MCMS site from SP1a on a x86 server to
a x64 server with MCMS SP2 (and the database has been migrated to SQL
Server 2005).
I've installed the hotfix for KB913401 which relates to deployments
failing on databases migrated to SQL 2005, and this has allowed
ex****ts to work via Site Manager.

However, the deployment script that replicates database content from
the authoring server to the production server does not work on the new
x64 SP2 box.  For this line:
Set oDeployObject =
wscript.Createobject("CmsDeployServer.cmsDeployEx****t.1")

an error is returned:
Could not create object named "cmsDeployServer.CmsDeployEx****t.1"

My understanding is that this uses the COM deployment API, is there
something I need to do to setup the COM deployment API on the new
server?  Could this be the result of files I am missing on the new box
or something I have neglected to install?

Thanks for any assistance,
Kelvin.