## I included the following
##
use Apache2::RequestRec ();
use Apache2::RequestIO ();
use Apache2::RequestUtil ();
use Apache2::SubProcess ();
##

## I used this option as well
..
..
my $r = shift;
$r->no_cache(1);
..
..
## And then the following
my $par_value="test";
my @argv;
push (@argv, $par_value);
my $cmdfile = "/tmp/test.pl";
$r->spawn_proc_prog($cmdfile, \@argv);
..
..