missing modules necessary or not?

[Liangliang Gao]

*** (back in BioPerl Build.PL) ***
 * You chose to install Clone and it installed fine
Checking prerequisites...
  recommends:
    *  You chose to install Ace but it failed to install
    *  Even though you wanted the optional module Algorithm::Munkres, you chose not to actually install it: do it yourself manually.
    *  Even though you wanted the optional module GraphViz, you chose not to actually install it: do it yourself manually.
    *  You chose to install XML::Twig but it failed to install
Checking features:
  Network...................enabled
  BioDBSeqFeature_mysql.....disabled
    - DBD::mysql is not installed
    - DBI is not installed
  BioDBGFF..................disabled
    - DBI is not installed
  BioDBSeqFeature_BDB.......enabled
  BioDBSeqFeature_SQLite....disabled
    - DBD::SQLite is not installed
    - DBI is not installed
  BioDBSeqFeature_Pg........disabled
    - DBD::Pg is not installed
    - DBI is not installed

ERRORS/WARNINGS FOUND IN PREREQUISITES.  You may wish to install the versions
of the modules indicated above before proceeding with this installation