Hi! I have this situation : Could not retrieve mirrorlist ftp://ftp.scientificlinux.org/linux/scientific/mirrorlist/sl-base-53.txt error was [Errno 4] IOError: [Errno ftp error] 550 Failed to change directory. http://ftp.scientificlinux.org/linux/scientific/53/x86_64/SL/repodata/repomd.xml: [Errno 14] HTTP Error 403: Forbidden Trying other mirror. sl-base | 1.1 kB 00:00 Could not retrieve mirrorlist ftp://ftp.scientificlinux.org/linux/scientific/mirrorlist/sl-security-53.txt error was [Errno 4] IOError: [Errno ftp error] 550 Failed to change directory. http://ftp.scientificlinux.org/linux/scientific/53/x86_64/updates/security/repodata/repomd.xml: [Errno 14] HTTP Error 403: Forbidden Trying other mirror. any idea about this? Thanks! Adrian