Nagios::Plugin module error

I have already a check HP MSA running on a “old” nagios server.
I like to install it on a new one. a ubuntu-14.04.4 server.
When i do a test. i get this.
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Can’t locate Nagios/Plugin.pm in @INC (you may need to install the Nagios::Plugin module) (@INC contains: /usr/local/nagios/libexec /usr/lib/nagios/plugins /etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /usr/local/lib/site_perl .) at ./check_msa_hardware.pl line 39.
BEGIN failed–compilation aborted at ./check_msa_hardware.pl line 39.
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i have installed Monitoring Plugins. Nagios Plugins not exist anymore…. 🙁

https://www.monitoring-plugins.org/news/new-project-name.html

But i have stil the same error. How to fix this?