Here is the Error I get:

Can't call method "Content" on an undefined value at c:\scripts\sr.pl 
+line 19.
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Here is the Code:

#!/perl/bin
    use strict;
    use Win32::OLE;
    use Win32::OLE::Const 'Microsoft Word';

my $oldfile = 'c:\tmp\test.doc';
my $newfile = 'c:\tmp\test1.doc';
my $oldtext = 'change me';
my $newtext = 'I am changed';

my $word = Win32::OLE->GetActiveObject('Word.Application')
    || Win32::OLE->new('Word.Application','Quit');

my $doc = $word->Documents->Open("$oldfile");

# is application visible 0=no  1=yes
$word->{visible} = 0;

my $search =  $doc->Content->Find;
my $replace = $search->Replacement;

$search->{Text} = $oldtext;
$replace->{Text} = $newtext;
$search->Execute({Replace => wdReplaceAll});

# save word file
$word->ActiveDocument->SaveAs($newfile);

# close word file
$doc->Close();
$word->Quit();
[download]

P.S. I have the same program written for Excel that works fine both locally and part of a CGI