yes that's it. Expanding my example now, i get another error "Can't locate object method "new" via package "Hello" (perhaps you forgot to load "Hello"?)"

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

use lib 'S:\incubator\ex\Hello.pm';
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();
[download]

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

package Hello; #SampleObject;


sub new {
    my ($class, %args) = @_;
    return bless { %args }, $class;
}

sub sample_method {
    my ($self) = @_;
    print $self->{sample_data};
}
1;
[download]

Hey amitsq, the following is incorrect:

use lib 'S:\incubator\ex\Hello.pm';
[download]

You add the *path* to the use lib pragma, not the file:

use lib 'S:\incubator\ex';
[download]

And add use Hello; :)

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();
[download]

use lib 'S:\incubator\ex\Hello.pm';
[download]

Add the directory in which modules reside, rather than the full path to the module. Also you still need to use it:

use strict;
use warnings;

use lib '/home/marto/temp';
use Hello;

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

Also: lib.

Can't locate object method "new" via package "Hello" (perhaps you forgot to load "Hello"?)

The hint is right - you did forget to load "Hello". See use.

adding the line  use "Hello" leads again to the error " The page cannot be displayed because an internal server error has occurred."