Resource Security (Sandbox) and Data Source.

OK, I think that this is new and may be a possible bug...  I have CF9 (standard) Update 1, hotfix 1 installed on Windows Server 2008 R2.  Everything was working fine.  I turned on resource security, disabled a bunch of tags, disabled a bunch of functions and left only my working datasource enabled.  These settings match a working Windows Server 2003 install with CF8.  Suddenly, my datasouce did not work.  It complained about the instance not working or not existing.  I turned Resource security off and my datasource was again enabled.  I turned resource securtity  back on, reset all of it's settings to allow everything (i.e. <<All Datasources>>, all functions, all tags etc.), with the idea of disabling un-needed functionality one-item-at-a-time until I uncovered the offending setting.  I restarted the CF service and once again, the datasource failed to connect even though all the resources were wide-open.  Disabling sandbox, restarting the CF service, restored the datasource.  Has anyone else experienced this issue, and/or found a work-around?