[Koha] prerequisite not found

[Viviane Ventura]

Hi,
I'm having problems getting some perl modules to work. CPAN seems to give
me the newest versions, but Makefile.PL insists that not found the
modules.  Maybe I have older modules around somewhere? How can I fix this?

[Wed Nov 16 10:08:21 2011] Makefile.PL: Warning: prerequisite DateTime 0.51
not found.
[Wed Nov 16 10:08:24 2011] Makefile.PL: Warning: prerequisite XML::RSS 1.31
not found.
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