Changing Destination Database For SSIS Package

Hi,

I have a small problem. I've gone through the SSIS wizard and created a dtsx file which imports data from an access file into a SQL Server 2005 database. It has been set to delete existing rows and enable identity insert.

I then edited the .dtsx package in SQL Server Management Studio and added an environment variable configuration to allow me to change the destination database. In the script which runs the dtsx, here is what I have (it's an x64 system, so hi have to use DTExec):

"C:Program Files (x86)Microsoft SQL Server90DTSBinnDTExec.exe" /file e: estimport.dtsx /set Package.Connections[DestinationConnectionOLEDB].Properties[InitialCatalog];newdatabasename

and here is the error I get:

Description: The configuration environment variable was not found. The envir
onment variable was: "InitialCatalog". This occurs when a package specifies an e
nvironment variable for a configuration setting but it cannot be found. Check th
e configurations collection in the package and verify that the specified environ
ment variable is available and valid.

I got the package.connections.etc etc path from originally creating the environment variable as an xml config file, then I could open the config file and see what the path was...

Any help would be appreciated :)