Thanks, I used
form_number(2)
I didn't get an error but as I mentioned before it doesn't do anything... as David mentioned I included the regex and I did
print $mechObject->content;
but it only gives me the html of the first page where I would like to see results based open the fields that I just filled..
How can I accomplish this..

my $url = 'http://www.ancestry.com/';
my $mechObject = WWW::Mechanize->new();

$mechObject->get($url);
die "can't get page!" 
  unless $mechObject->success &&
          $mechObject->content =~ /Your First Name/i;
  
die "can't find form!"
  unless $mechObject->form_number(2);

my @values = ('first', 'last', [option => 'M']);
die "couldn't fill out form!"
  unless $mechObject->set_visible(@values) == 3;

$mechObject->submit;
die "can't submit form!" 
  unless $mechObject->success && 
          $mechObject->content =~ /Your Last Name/i;
          
print $mechObject->content;
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