Hello Carole,
but how can you expect to get working MSSQL database from server1 with version 2005 on server2 with version 2000? It has to be same database release! CMS tables were created in version 2005 so I really doubt this can work in 2000 correctly. It surprises me you even got some results via Excel..
You say that data source change was done successfully? Which options exactly you used to remap data source?
If this doesn't work you could try to create new SIA node.
Regards,
Matus