are you sure you are using cm 2.4.0? what does (cm-version) return? i will build binaries for the book as soon as the semester is over and i have time to set up the sourceforge account again. in the meantime you can install cm-2.4.0 yourself from the ccrma ftp server ftp://ftp-ccrma.stanford.edu/pub/Lisp/cm/sources/cm-2.4.0.tar.gz