We've been trying to resolve that issue since last night. Basically, we have the same problems on two servers. So, we started to compare every setting of the Components Services from a server where it works with those two servers where it doesn't. We compare the "My Computer" Properties settings and each of the components settings.

There is one setting that I would like to get some info on. If you right click on "My Computer", select Properties, then Default Properties, you'll see in the middle of the form a section for "Default Distributed COM communication properties". The first listbox is about Default Authentication Level. Can someone explain me why on one server, we have None and on other two servers we have Connect? Where is this coming from? What may affect that setting?