bugzilla 安装时timezone not found

Question

各位：

在CentOS 6.3 上安装bugzilla,执行完 /usr/bin/perl install-module.pl --all 之后，还剩下两个module显示not found 

Checking for    DateTime-TimeZone (v0.71)     not found 

Checking for           DBD-Oracle (v1.19)     not found 

但是 执行了/usr/bin/perl install-module.pl DateTime::TimeZone 之后

Checking for                 CPAN (v1.81)     ok: found v1.9402 
Checking for                 YAML (any)       ok: found v1.13 
Checking for   ExtUtils-MakeMaker (v6.31)     ok: found v6.98 
CPAN: Storable loaded ok (v2.20)
Going to read '/root/.cpan/Metadata'
  Database was generated on Tue, 14 Oct 2014 05:17:02 GMT
Installing DateTime::TimeZone version 1.75...
DateTime::TimeZone is up to date (1.75).