Remote Execution Of Package Via Dtexec And Access Denied

I am finishing a port of a project that was done with RS2000/AS2000/DTS2000. The cube process is triggered remotely by a Korn Shell script from Services for Unix that runs a DTS package:

dtsrun.exe /S "$ANALYSIS_SERVICES_HOST" /U "$ANALYSIS_SERVICES_USER" /P "$ANALYSIS_SERVICES_PASSWORD" /N "$PACKAGE_NAME"

I have finished porting the AS and RS parts to their 2005 equivalents and now I am trying to get the cube processing converted. I have built a SSIS package that processes the cube and I have deployed it to the SQL Server in MSDB. When I am logged on to the SQL Server box directly, I can execute the package via the Management Studio and from the command line via:

dtexec /Ser "$ANALYSIS_SERVICES_HOST" /DT "$PACKAGE_PATH_NAME"

When I try to register the SQL Server in Integration Services from my client PC Management Studio it fails with "Access Denied". When I try to run the dtexec from my client PC it fails with "Access Denied".

I have walked through Kirk Haselden's instructions at:

http://sqljunkies.com/WebLog/knight_reign/archive/2006/01/05/17769.aspx

(adding myself to Distributed COM Users, noting the correct DCom Config settings for MsDtsServer and restarting the Integration Services service) and the problem is still not resolved. I have posted to the DTS group on Technet and now I am posting here. This can not be run scheduled by SQL Agent as it needs to be triggered by other load/postload activities. Are there any other fixes for this problem that I can try?

Thanks,

Keehan

By the way, being able to have all the parts of this project in one dev environment is great. The previous application was developed in 3 separate locations which was pretty clunky.