Could Not Load Package ... Because Of Error 0x80070005. Description: Access To The Path ... Is Denied.

Hi all,

I'm trying to let certain users execute an SSIS package through an SP in SQL.

I've set up a proxy account for xp_cmdshell that the other users will use to execute dtexec with, but i get this message:

Could not load package "File SystemCODA_Actuals" because of error 0x80070005.
Description: Access to the path 'C:Program FilesMicrosoft SQL Server90DTSPackagesCODA_Actuals.dtsx' is denied.

When i log onto the server with the proxy account, i can navigate to that folder and open the package.

When try to execute it from the command shell:
dtexec /DTS "File SystemCODA_Actuals" /Decrypt "password" /Reporting E /SET Package.Variables[User::JobId].Value;25'


i get the same message. How come? How do i fix this? I've read somewhere that i should grant read to the package store to that user , how do i do that? Can't find that option in the tools or manuals.

Thanks in advance,

Gert-Jan