Hey. This happened to me too with a 3-d-c sci-fi set, Way of the Samurai and Mr Hyde’s jeans. I eventually figured out a way to fix it but you need a cr2 editor to do it as I am assuming the file in question is a cr2. You could probably also do it with notepad++ which is what I used to fix the .dsf files. Anyway, here is the thread about it:
Das 4.5 seems to be MUCH pickier about this stuff as both 4.0 and 3 would fully load the items but in 4.5 I got something in the scene tab, but an invisible item and nothing at all in the surfaces tab.