dm_multipath module is not loading after reboot

dm_multipath module is not loading after reboot

# uname -a
Linux servername 2.6.18-274.el5 #1 SMP Mon Jul 25 13:17:49 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux

# cat /etc/issue
Oracle Linux Server release 5.7
Kernel \r on an \m

# service multipathd status
multipathd (pid  4901) is running...

# mpathconf
multipath is enabled
find_multipaths is disabled
user_friendly_names is enabled
dm_multipath module is not loaded
multipathd is chkconfiged on

# chkconfig --list multipathd
multipathd      0:off   1:off   2:on    3:on    4:on    5:on    6:off

# cat /etc/multipath.conf

# This is a basic configuration file with some examples, for device mapper
# multipath.
# For a complete list of the default configuration values, see