Source and Description not passed when using Err.Raise from MTS

When raising an error inside a VB component in an MTS package, that is called from another VB component in a different MTS package, the err.source and err.description are not passed. Although I have set to Nothing all the references to objects before raising the error, source and description are still not passed when a use "setabort" before killing the objectcontext object. If I comment out the "oc.setabort " ine, before killing the 'oc' object, err.source and err.description are passed properly. But I need to say "setabort" because of the error.
Any suggestion is appreciated