[plt-scheme] mzscheme3m with readline?

is it possible to use the readline extension
with mzscheme3m, statically or dynamically?

i managed to get drscheme to run as 3m and to
install readline.plt as a 3m extension, but
when i try to load it via

  (require (lib "rep.ss" "readline"))

i get this:

  Welcome to MzScheme3m version 204, Copyright (c) 1995-2003 PLT
  load-extension: bad version 204 (not 204 at 3m) from "/usr/local/plt/collects/readline/compiled/native/i386-freebsd/3m/mzrl.so"

any pointers greatly appreciated,
daniel