ftp installation: no proposal

hello list i try to install opensuse via ftp. there's no problem starting yast etc. but in the software selection i get the error like no packages found on installation source. error: no proposal. (don't know english message because i am swiss). ftp server is a mirror in switzerland (mirror.switch.ch) which seems to be up to date. becuase ftp.opensuse.org is busy. does anybody know what the problem is? or isn't the mirror uptodate? thank you and sorry for my english... by, chris