< ftp://ftp.lyx.org/pub/lyx/stable/lyx-1.5.6.tar.bz2 looking for file 550 lyx-1.5.6.tar.bz2: No such file or directory. > ftp://ftp.lyx.org/pub/lyx/stable/1.4.x/lyx-1.4.5.1.tar.bz2 ok