vstfpd and rpm

[Hans Müller <ndof gmx li>]

Hello, I use the vsftp demon that comes with FC2,
When i will update a package via rpm -Fvh ftp:// on another computer it fails.
on the client i have try:
rpm -Fvvh ftp://rpmupdate:rpmupdate homer netz-von-frank/Fedora/2/update/mkisofs-2.01.1-0.FC2.1.i386.rpm
rpm says:
Retrieving 
ftp://rpmupdate:rpmupdate homer netz-von-frank/Fedora/2/update/mkisofs-2.01.1-0.FC2.1.i386.rpm
D:  ... as /var/tmp/rpm-xfer.B30w2g
D: logging into homer.netz-von-frank as rpmupdate, pw rpmupdate
D: failed to open 
ftp://rpmupdate:rpmupdate homer netz-von-frank/Fedora/2/update/mkisofs-2.01.1-0.FC2.1.i386.rpm:
error: skipping 
ftp://rpmupdate:rpmupdate homer netz-von-frank/Fedora/2/update/mkisofs-2.01.1-0.FC2.1.i386.rpm - 
transfer failed - Unknown or unexpected error

at the logfile on the server i can find a error messge about vsftpd that say:
[rpmupdate] FTP response: Client "192.168.0.1", "200 Switching to Binary mode."
Fri Dec 31 18:10:21 2004 [pid 9813] [rpmupdate] FTP command: Client "192.168.0.1", "SIZE 
/Fedora/2/update/mkisofs-2.01.1-0.FC2.1.i386.rpm"
Fri Dec 31 18:10:21 2004 [pid 9813] [rpmupdate] FTP response: Client "192.168.0.1", "550 Could not 
get file size."

what must I do that i can use rpm with vsftpd??