What causes the Component not to load?

I have a customerize componets and start to quit working for no reason. It worked fine for sometime but it quit after a while. I opened up the Event Viewer to check the error message. It stated ” ….CCreateObject failed …. Transaction Server Internals Information: could not find d:\viper\……\ccontext.cpp”. (My D drive is a removable drive – Jazz drive). So it does not make sense to me. Is anybody know what action should I took instead to restore the whole thing from my backup tape.
Thanks a million.