how exactly are you upgrading ?
did you download the redhat 6.6 release rpm ?
and then run "upgrade"
or
have the repos set to use 6 and NOT 6.4
then do a normal everyday "update"
BUT if that you would have been using 6.6 for about a year already
or
run
Code:
su -
yum --releasever=6.6 upgrade
mind you
RHEL is NOT free
to upgrade, a PAID FOR license is required !
if you do not have a current support contract
there is NOTHING we can do to help