Just print country code

Sorry if this is too dumb, I'm no programmer. To begin, I just want to print the country code of the visitor. I tried this 3 scripts on page.tpl.php but I can't get it to work:

<?php
$addr = $_SERVER['REMOTE_ADDR'];
$country = module_invoke('ip2cc', 'get_country', $addr);
print_r($country->country_code2);
print_r($country->country_code);
?>

<?php
$co = ip2cc_get_country($_SERVER['REMOTE_ADDR']); 
print_r($co->country_code2); 
print_r($co->country_code3); 
print_r($co->country_name); 
print_r($co->net_name); 
print_r($co->as_number); 
print_r(theme("ip2cc_flag", $co,$_SERVER['REMOTE_ADDR'])); 
print_r(theme("ip2cc_ip_flag",$_SERVER['REMOTE_ADDR'])); 
print_r(theme("ip2cc_ip_flag_long",$_SERVER['REMOTE_ADDR']))
?>

<?php
$co2=module_invoke('ip2cc','get_country',$_SERVER['REMOTE_ADDR']);
print($co2->country_code);
?> 

I just get nothing printed.

Is my code wrong? Or am In doing something else wrong?

I'll appreciate any advice or simple example on how to print visitor's country code.

Thanks