I am in the test phases of a 3-tier distributed application, Academy Information Management System - AIMS) written in VB6 / MSSQL Server. It was developed in a project group consisting of a UI project (AIMS_UI), a middle-tier business object project (AIMS_BO), and a data-tier object project (AIMS_BODT). During development the middle and data tiers where set to project compatibility and everything worked fine. I am now trying to deploy the middle and data tiers into a COM+ Package on our Win2K Server for testing but still have to make changes to the projects as alpha testing reviews problems. This is were I am having trouble. I want to avoid "DLL Hell" but am having problems changing between binary compatibility, compling, deploying, updating the server applications etc. The references in the project group are erratic. When I export the application proxy for AIMS_BO sometimes it works on my production machine but when I try it on other client test machines somettimes it works and other times (more often) it doesn't. Any advise on the proper sequence for compiling, registering, and switching between project mode and COM+ distributed mode.