the below pasted script also produces an error

First Nagios:Plugin has been scratched and replaced with Monitorin g::Plugin so I replaced all the instances of Nagios::Plugin.
Still I get the error:
./check_squid2.pl -H 10.0.0.2 -p 80
Use of uninitialized value in sprintf at /usr/lib/perl5/site_perl/5.18.2/Monitoring/Plugin/Performance.pm line 67.
Use of uninitialized value in sprintf at /usr/lib/perl5/site_perl/5.18.2/Monitoring/Plugin/Performance.pm line 67.
Use of uninitialized value in sprintf at /usr/lib/perl5/site_perl/5.18.2/Monitoring/Plugin/Performance.pm line 67.
Use of uninitialized value in sprintf at /usr/lib/perl5/site_perl/5.18.2/Monitoring/Plugin/Performance.pm line 67.
Use of uninitialized value in sprintf at /usr/lib/perl5/site_perl/5.18.2/Monitoring/Plugin/Performance.pm line 67.
Use of uninitialized value in sprintf at /usr/lib/perl5/site_perl/5.18.2/Monitoring/Plugin/Performance.pm line 67.
SQUID2 OK – Squid have clients and ICP requests queued | ‘HTTP requests’=c;; ‘sent ICP requests’=c;; ‘received ICP requests’=c;;
squid version 4
who wants to fix this?