changed it, but it just looks worse since the error is again : The page cannot be displayed because an internal server error has occurred.
current code in hello-2.pl:

#!d:\perl\bin\perl.exe 

use lib 'S:\incubator\ex';
use Hello;

print"Content-type:text/html;charset=UTF-8\n\n" ;

my $obj = Hello->new( sample_data => 'hello world',
                             more_data   => 'blah blah blah' );
$obj->sample_method();
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