Executing Package From C# On 64bit Platform

Hi

I have been successfully executing a series of IS packages from C# using the following syntax

Microsoft.SqlServer.Dts.Runtime.Package package;
package = app.LoadPackage(ISPackagePath + @"myPackage.dtsx", null);
package.ImportConfigurationFile(ISPackagePath + @"MyConfiguration.dtsConfig");
result = package.Execute();
package.Dispose();

My client has just moved their SQL boxes to a 64bit platform and this process no longer runs.

Now im also running some packages in a SQL Agent job on the SQL box and im aware of the issue of an SSIS job step defaulting to using the 64bit version of DTExec.exe. Ive updated those job steps to be operating system (cmdExec) type steps calling the 32bit version of DTExec.exe, and everything is fine there.

Is there anyway to force the Microsoft.SqlServer.Dts.Runtime.Package object in my C# code to use the 32bit version of DTEexec.exe? This code is running on the same 64bit SQL server box as the SQL agent job. Or will Microsoft.SqlServer.Dts.Runtime.Package object always default to using the 64 bit version if it is executed on a 64bit box ?

I would just call sp_start_job from C# and implement the IS packages in another job but unfortunatly my code cannot be given correct permissions to see the SQL agent jobs.

Any ideas?
Thanks