i tried to update my mdk9.1 with urpmi but i got core dumped

[root@orkid root]# urpmi --auto-select
perl: rpmio_internal.h:447: c2f: Assertion `fd && fd->magic == 0x04463138' failed.
Aborted (core dumped)

my urpmi.cfg
[root@orkid root]# cat /etc/urpmi/urpmi.cfg
usc-main http://mirrors.usc.edu/pub/linux/dis.../Mandrake/RPMS {
hdlist: hdlist.usc-main.cz
with_hdlist: ../base/hdlist.cz
}

usc-contrib http://mirrors.usc.edu/pub/linux/dis...1/contrib/RPMS {
hdlist: hdlist.usc-contrib.cz
with_hdlist: ../../i586/Mandrake/base/hdlist2.cz
}

usc-update http://mirrors.usc.edu/pub/linux/dis...dates/9.1/RPMS {
hdlist: hdlist.usc-update.cz
with_hdlist: ../base/hdlist.cz
update
}

any idea why this happen?
TQ