I am unable to create triggers for macros created in my MSC-400 using the Universal Browser in my MX-900 editor.

I am trying to use the Universal Browser in the MX-900 editor to load macros that I have defined in my MSC Editor program. When I attempt to open the .msf file I created in the MSC Editor (by clicking the "Open" icon on the toolbar of the MX-900 Editor's Universal Browser), I get an error message saying "Unknown file format."

Additional info: Using the MX-900 Editor's Universal Browser I am able to open the "default.msf" file that comes with the MSC Editor install. If I open this file and re-save it in the MSC Editor however, (making no changes - just open and save), I can no longer open it in the MX-900 Editor's Universal Browser. This indicates to me that the MSC Editor is doing something to the .msf file that is preventing the MX-900 Editor from being able to open it.

Configuration: I am running Vista Ultimate. I have tried every combination of running the editors as an administrator, and in Windows XP compatibility mode.

Thanks in advance for your help!