Hi Mr. Busschots.
If i run check_rogue_detect.pl from the command-line directly, obtein the following event:

[root@localhost plugins]# ./check_rogue_dhcp.pl
Can't locate Net/RawIP.pm in @INC (@INC contains: /usr/lib/nagios/plugins/roguedetect /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.7/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.6/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl/5.8.7 /usr/lib/perl5/site_perl/5.8.6 /usr/lib/perl5/site_perl/5.8.5 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.7/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.6/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl/5.8.7 /usr/lib/perl5/vendor_perl/5.8.6 /usr/lib/perl5/vendor_perl/5.8.5 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 .) at /usr/lib/nagios/plugins/roguedetect/DHCPDetect.pm line 58.
BEGIN failed--compilation aborted at /usr/lib/nagios/plugins/roguedetect/DHCPDetect.pm line 58.
Compilation failed in require at ./check_rogue_dhcp.pl line 13.
BEGIN failed--compilation aborted at ./check_rogue_dhcp.pl line 13.

What is the error??? what i have to do???
Wait a Your fine reply. Thank's. Osvaldo