Actually that was it, you have to reinstall Ebook Publisher AFTER you install pdfread.
Works great now!
Actually, I would guess that you have GEB Librarian installed and you installed it AFTER eBook Publisher. GEB Librarian installs an older version of the SBPubX library which is used for IMP creation. Naturally, when you reinstalled it registered the newer version, which made the problem go away :-)