htaccess in subdomain

[orhhun]

i prefer to use htaccess file to make seo links in my site.

and last week, i started to make htaccess file for my subdomains.

i am using this code on my base directory of subdomain(subdomain.site.com/.htaccess):

Options +FollowSymLinks

RewriteEngine on

RewriteRule ^folder/(.*) page.php?who=$1

 

i want this:

when i write: subdomain.site.com/folder/kelly

it must be opened: subdomain.site.com/page.php?who=kelly

 

but its not working fine with this code

 

there is an interesting point:

when i write the adress like this:

site.com/subdomain/folder/kelly = ok, its working with the code above

but if i write this:

subdomain.site.com/folder/kelly = its not working with the same code

 

do u have any idea about it? what must i do?

(my subdomanis are not fake)