BuddyPress.org

Hi, i would like to check if a field is empty or not.
This would happen when the user Log in.
Actually i have a Page Template with a piece of code that redirects the person to their profile to edit it, but i would like to detect if the user has the fields completed or not.
Here is what i’ve been working on, but its not working:

<?php
);
if (bp_get_profile_field_data(‘field=36’) == ""){ //36 is the id of the field 
i want to check
?>

<?php 
$var1 = bp_loggedin_user_domain();
$var2 = BP_XPROFILE_SLUG ;
$var3 = '/edit/group/1';
$location = $var1.$var2.$var3;

header("location: $location" );
}
?>
<?php else { ?>
	<?php 

	header("location: http://www.url.com" );
	}?>
<?php endif; ?>