Domain pointers work on Wildcard subdomains

[MohsenB]

hi

i set Wildcard subdomain from this help:
http://help.directadmin.com/item.php?id=127

and work correctly.
i wrote this code in file test.php:

<?php
	echo $_SERVER['HTTP_HOST'];
?>

for address "md.com/test.php" >> "md.com" as output.
for address "sd.md.com/test.php" >> "sd.md.com".
its ok.

how to set other domains to point same main folder of main domain?
now i set "Domain Pointer": md2.com [point to]-> md.com.

for address "md2.com/test.php" >> "md2.com".
it is also ok.

but when go to address sd.md2.com/test.php show "ERR_NAME_NOT_RESOLVED".

How can I solve this problem?