Hello, the command yum --enablerepo=* upgrade ended with this error message : ---> Downloading header for kernel-module-r1000-2.6.9-42.0.2.ELsmp to pack into transaction set. ftp://ftp.scientificlinux.org/linux/scientific/4x/i386/errata/SL/RPMS/r1000/kernel-module-r1000-2.6.9-42.0.2.ELsmp -2.2-1.SL4x.i686.rpm: [Errno 4] IOError: [Errno ftp error] 550 Failed to change directory. Trying other mirror. Error: failure: r1000/kernel-module-r1000-2.6.9-42.0.2.ELsmp-2.2-1.SL4x.i686.rpm from sl-errata: [Errno 256] No mo re mirrors to try. 1. what is wrong ? 2. what can I do to fix this ? thanks François Colonna