Hi,
i have the same problem but perhaps different root cause, which I have not figured out yet. Appreciate monks' help...
cpan
1> m GD
CPAN: Storable loaded ok (v2.20)
Reading '/root/.cpan/Metadata'
Database was generated on Tue, 21 Apr 2015 02:53:28 GMT
Module id = GD
CPAN_USERID LDS (Lincoln D. Stein <lincoln.stein@gmail.com>)
CPAN_VERSION 2.56
CPAN_FILE L/LD/LDS/GD-2.56.tar.gz
UPLOAD_DATE 2014-10-28
INST_FILE (not installed)
cpan
2> install GD::Graph
CPAN: Module::CoreList loaded ok (v5.20150320)
GD::Graph is up to date (1.49).