I'm trying to create an ArcGIS tool which accepts an SDE connection file as an input. I made a new interface with an input parameter and set the type to Database Connections. When I open the tool and click the "browse" icon, the dialog opens to the Database Connections folder but there is nothing in it. If I navigate to Database Connections in the ArcCatalog window however I see all my usual connection files. Does anyone know why the tool would not be displaying those?