mysql-mmm-monitorサービス起動エラー、コンパイル関連Class::Singletonパッケージなし

[root@DB1 mmm_deps]# cd /etc/init.d/
[root@DB1 init.d]# chkconfig mysql-mmm-monitor on
[root@DB1 init.d]# service mysql-mmm-monitor start
Daemon bin: '/usr/sbin/mmm_mond'
Daemon pid: '/var/run/mmm_mond.pid'
Starting MMM Monitor daemon: Base class package "Class::Singleton" is empty.
    (Perhaps you need to 'use' the module which defines that package first.)
 at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Agents.pm line 2
BEGIN failed--compilation aborted at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Agents.pm line 2.
Compilation failed in require at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Monitor.pm line 15.
BEGIN failed--compilation aborted at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Monitor/Monitor.pm line 15.
Compilation failed in require at /usr/sbin/mmm_mond line 28.
BEGIN failed--compilation aborted at /usr/sbin/mmm_mond line 28.
failed
[root@DB1 init.d]# perl -MCPAN -e shell
Terminal does not support AddHistory.

cpan shell -- CPAN exploration and modules installation (v1.7602)
ReadLine support available (try 'install Bundle::CPAN')

cpan> Class::Singleton
Can't locate object method "Singleton" via package "Class" (perhaps you forgot to load "Class"?) at /usr/lib/perl5/5.8.8/CPAN.pm line 201, <FIN> line 1.

cpan> Class   
Unknown command 'Class'. Type ? for help.

cpan> install Class::Singleton
CPAN: Storable loaded ok
Going to read /root/.cpan/Metadata
  Database was generated on Mon, 25 Feb 2013 17:53:02 GMT
Running install for module Class::Singleton
Running make for A/AB/ABW/Class-Singleton-1.4.tar.gz
CPAN: LWP::UserAgent loaded ok
Fetching with LWP:
  http://mirrors.sohu.com/CPAN/authors/id/A/AB/ABW/Class-Singleton-1.4.tar.gz
CPAN: Digest::MD5 loaded ok
Fetching with LWP:
  http://mirrors.sohu.com/CPAN/authors/id/A/AB/ABW/CHECKSUMS
Checksum for /root/.cpan/sources/authors/id/A/AB/ABW/Class-Singleton-1.4.tar.gz ok
Scanning cache /root/.cpan/build for sizes
Class-Singleton-1.4/
Class-Singleton-1.4/Changes
Class-Singleton-1.4/lib/
Class-Singleton-1.4/lib/Class/
Class-Singleton-1.4/lib/Class/Singleton.pm
Class-Singleton-1.4/Makefile.PL
Class-Singleton-1.4/MANIFEST
Class-Singleton-1.4/META.yml
Class-Singleton-1.4/README
Class-Singleton-1.4/t/
Class-Singleton-1.4/t/singleton.t

  CPAN.pm: Going to build A/AB/ABW/Class-Singleton-1.4.tar.gz

Checking if your kit is complete...
Looks good
Writing Makefile for Class::Singleton
cp lib/Class/Singleton.pm blib/lib/Class/Singleton.pm
Manifying blib/man3/Class::Singleton.3pm
  /usr/bin/make  -- OK
Running make test
PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/singleton....ok                                                            
All tests successful.
Files=1, Tests=29,  0 wallclock secs ( 0.01 cusr +  0.00 csys =  0.01 CPU)
  /usr/bin/make test -- OK
Running make install
Manifying blib/man3/Class::Singleton.3pm
Installing /usr/lib/perl5/site_perl/5.8.8/Class/Singleton.pm
Installing /usr/share/man/man3/Class::Singleton.3pm
Writing /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi/auto/Class/Singleton/.packlist
Appending installation info to /usr/lib/perl5/5.8.8/i386-linux-thread-multi/perllocal.pod
  /usr/bin/make install  -- OK

cpan> exit
Terminal does not support GetHistory.
Lockfile removed.
[root@DB1 init.d]# service mysql-mmm-monitor start
Daemon bin: '/usr/sbin/mmm_mond'
Daemon pid: '/var/run/mmm_mond.pid'
Starting MMM Monitor daemon: Ok
[root@DB1 init.d]#