thanks for replay

I added given statement in httpconf file.

still facing same issue

code: httpd.conf

LoadModule perl_module modules/mod_perl.so
  PerlRequire conf/startup.pl
  PerlSwitches -I/usr/local/apache2/cgi-bin/pages
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code: tool.cgi

BEGIN {
    print STDERR "\n $_\n" foreach @INC;    
}
use strict;
use CGI;
use Data::Dumper;
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);
use web::Home;
use CONF;
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---

And also I found one thing observe below outputs

output: startup.pl

/usr/local/apache2/cgi-bin/pages

/etc/perl

/usr/local/lib/perl/5.10.0

/usr/local/share/perl/5.10.0

/usr/lib/perl5

/usr/share/perl5

/usr/lib/perl/5.10

/usr/share/perl/5.10

/usr/local/lib/site_perl
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Output: tool.cgi in STDERR

/etc/perl

/usr/local/lib/perl/5.10.0

/usr/local/share/perl/5.10.0

/usr/lib/perl5

/usr/share/perl5

/usr/lib/perl/5.10

/usr/share/perl/5.10

/usr/local/lib/site_perl
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Here I am not found there module path in tool.cgi sterr output.