After executing, I am getting below error:

Here you go Premature end of script headers, Premature end of script headers, site:perlmonks.org "Premature end of script headers"

Multiple nodes named "Premature end of script headers" were drunk:

Sep 30, 2015 at 07:04 UTC	Premature end of script headers	(perlquestion)	by gszabo
May 11, 2010 at 08:41 UTC	Premature end of script headers	(perlquestion)	by zitic
Oct 23, 2004 at 14:50 UTC	premature end of script headers	(perlquestion)	by fadingjava
Jul 28, 2004 at 20:54 UTC	Premature End of Script Headers	(perlquestion)	by dsb
Mar 29, 2004 at 16:04 UTC	Premature end of script headers	(perlquestion)	by CandymanCID
Aug 01, 2003 at 03:13 UTC	Premature end of script headers	(perlquestion)	by Nickd_69
Apr 30, 2003 at 03:11 UTC	Premature End of Script Headers	(perlquestion)	by Anonymous Monk
Jun 29, 2002 at 21:26 UTC	Premature End of Script Headers	(perlquestion)	by Anonymous Monk
Apr 20, 2002 at 08:19 UTC	Premature end of script headers	(perlquestion)	by Anonymous Monk

Work through these, check the logs, ... CGI Help Guide , Troubleshooting Perl CGI scripts, Basic debugging checklist , brian's Guide to Solving Any Perl Problem