I had a couple of books that wouldn't convert using the ConvertLIT GUI. (The exploded html files all had a size of 0.) I had to use the clit exe at the command line to keep from exploding the file which is what the GUI did. Once there, I used Calibre to convert the deDRM lit file into the lrf format for my Sony reader. This process was discussed in another thread here in MR which helped me enormously!
Kaz