Access 2007 Runtime, Mapped Drive, and Trusted Locations

Hello,

I've got a Microsoft Access application that has a frontend/backend setup.  The frontend looks for the backend on the K:\ drive.

I'm installing to a very small site on a Windows XP laptop using the Access 2007 runtime.  I'm mapping a local share to K: and placing the backend in the K: drive then running the frontend (accdr) from the Desktop.  When I start the app I'm presented with an empty Access window and I'm not seeing any of the application's controls.

Similar behavior is exhibited under one of two conditions, either the drive letter is incorrectly mapped, or there is a trust center issue.  I've installed this on Windows 7 PC's with the Access runtime and on Windows XP PC's with the full version of Access without issue, but this is the first Access Runtime/WinXP install I've done.  

I've been looking around and I see reference to a reg edit that allows you to add a trusted location but it doesn't seem to be working for me.

What is the registry modification(s) that I would need to make to allow the frontend to run from the user's desktop and connect to the backend which is a network drive mapped to a local folder share?

Thanks in advance!