[CentOS] perl question

I am trying to run a perl script that said it needs Net::SMPP

I ran this:
your_host]# *perl -MCPAN -e shell*
cpan shell -- CPAN exploration and modules installation (v1.76)
ReadLine support enabled
cpan> *install Net::SNMP

seemed to work. no errors reported.
however when I run perl I still get the same error saying needs

 ./sendmessage.pl
Can't locate Net/SMPP.pm in @INC (@INC contains: 
/usr/lib64/perl5/site_perl/5.8.8/x86_64-linux-thread-multi 
/usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl 
/usr/lib64/perl5/vendor_perl/5.8.8/x86_64-linux-thread-multi 
/usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl 
/usr/lib64/perl5/5.8.8/x86_64-linux-thread-multi /usr/lib/perl5/5.8.8 .) 
at ./sendmessage.pl line 18.
BEGIN failed--compilation aborted at ./sendmessage.pl line 18.

What else do I need?

Jerry
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