Thanks for your advice munk.
Anyhow I am loading word constants within a package as

use WIN32::OLE::Const 'Microsoft Word';
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The other thing is the constant in close method work perfectly; I checked it. If you have free enough time here's whole code
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#####################
#
# Initiating program
#
#####################

use strict;
use LTG::DocBuddy::OfficeSub;
use File::Find;

require Exporter;
use vars qw(@ISA @EXPORT);

my $dir = 'C:\sumith\project\test_data\input\word\small';

find(\&parse_office_doc, $dir);
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---------------------------------------------------

#####################
#
# Office package to handle all
# types of office files (but I 
# simplified it, yet give same 
# problem
#
#####################

package LTG::DocBuddy::OfficeSub;

use strict;
use diagnostics;
use WIN32::OLE;
use WIN32::OLE::Variant;
require Exporter;
use vars qw(@ISA @EXPORT);
use LTG::DocBuddy::Config qw($DEBUG);
use LTG::DocBuddy::WordSub;

@ISA    = qw(Exporter);
@EXPORT = qw(parse_office_doc);

$DEBUG && print "Loading LTG::DocBuddy::OfficeSub package...\n";

my ($word_app, $excel_app, $ppt_app, $access_app);
$word_app = Win32::OLE->new('Word.Application', 'Quit(0)');

sub parse_office_doc {
    $DEBUG && print "Calling LTG::DocBuddy::OfficeSub->parse_office_do
+c(@_) method...\n";
    my $file = shift;
    my %file_info = ();
    my $obj;
    my $whole_text;

    if ($obj = $word_app->Documents->open($file, 0, 1)) {
        %file_info = read_doc_properties($obj);
        $file_info{'Style'} = {get_word_content($obj)};
        foreach my $style (keys %{$file_info{'Style'}}) {
            $whole_text .= ${$file_info{'Style'}}{$style};
        }
        delete $file_info{'Style'};
        $obj->Close(0);
    }
    if (not $obj) {
        return {
            error => "$file: GetObject not successful: ".  
                    Win32::OLE->LastError()
        };
    }
    $file_info{'Whole text'} = $whole_text;
    return %file_info; 
}

sub read_doc_properties {
    $DEBUG && print "Calling LTG::DocBuddy::OfficeSub->read_doc_proper
+ties(@_) method...\n";    
    my $obj = shift;
    my %file_info;
    if (my $properties = $obj->{BuiltInDocumentProperties}) {
        foreach my $prop (in $properties) {
            $file_info{$prop->{'Name'}} = "$prop->{'Value'}" if ($prop
+->{'Value'});
        }
    }
    return %file_info;
}

1;
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---------------------------------------------------

#####################
#
# Word handling package
#
#####################

package LTG::DocBuddy::WordSub;

use strict;
use WIN32::OLE;
use WIN32::OLE::Variant;
use WIN32::OLE::Const 'Microsoft Word';
require Exporter;
use vars qw(@ISA @EXPORT);
use LTG::DocBuddy::Config qw($DEBUG); 

@ISA    = qw(Exporter);
@EXPORT = qw(get_word_content);

$DEBUG && print "Loading LTG::DocBuddy::WordSub package...\n";

sub get_word_content {
    $DEBUG && print "Calling LTG::DocBuddy::WordSub->get_word_content(
+@_) method...\n";
    my $obj = shift;
    my $enumerate = new Win32::OLE::Enum($obj->Paragraphs());
    my %content;
    while(defined(my $paragraph = $enumerate->Next())) {
        $content{$paragraph->{Style}->{NameLocal}} .= "$paragraph->{Ra
+nge}->{Text}\n\n";
    }
    $enumerate->Reset();
    return %content;
}

1;
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---------------------------------------------------
Thanks again for your attention and do you have any suggessions?