[MSV8i C#] MDL Loader: Could not Load Application

This a quite a bit strange topic, I built an addins and ran well with Microstation V8i SS3/SS4. One day, I found that the same addins which is not able to be loaded in Microstation SS10, with a message shown: "MDL Loader: Could not Load Application D:\XXX.dll". Are there any ways to fix it? Or shows what's wrong while loading the addins?