virtual subdomains

Greetings.

I have two domains on separate servers with wildcard dns activate to create virtual subdomains using htaccess.

on a server htaccess rules works but on the other dont.
code is:

RewriteCond %{HTTP_HOST} !^www\.soft2click\.com$
RewriteCond %{HTTP_HOST} ^.+\.soft2click\.com$
RewriteCond %{REQUEST_URI} !^(www|ftp)$ 
RewriteCond %{REQUEST_FILENAME} !^/home/soft/public_html/
RewriteRule ^(.*)$ %{HTTP_HOST}$1 [C]
RewriteRule ^(.*)\.soft2click\.com/ /index.php?a=prog&det=$1 [QSA,L]


RewriteCond %{HTTP_HOST} ^([^\.]+)\.soft2click\.com$ [NC]
RewriteRule ^purchase /index.php?a=prog&det=%1&buy 

Code (markup):

do not understand what the problem is.

if the server that goes up the code, replace the last rule:

RewriteRule ^(.*) /home/soft/public_html/index.php?a=prog&det=%1

Code (markup):

go, but all the links like this:

h ttp: / / produs.site.com / something
go to
h ttp: / / produs.site.com /
what is not good

Please help from your side.
Thanks in advance