rpm error:rpmdb: PANIC: fatal region error detected;

[shams]

hi,
i have fc6 updates in my local yum repo, the problem is when run the yum update or run the rpm -Uvh for these files, the porcess is aborting with these messages:
rpmdb: PANIC: fatal region error detected; run recovery
error: db4 error(-30977) from db->close: DB_RUNRECOVERY: Fatal error, run database recovery

two times i removed the __db files from /var/lib/rpm and then run the rpm --initdb but still i get these errors, any one can help please?

[leigh123linux]

try

su -
rm /var/lib/rpm/__db*
rpm --rebuilddb
yum clean all