problem with subdomain after redirection nameserver

I have redirect my domain from one server to another.And my website has sub domain concept.Before redirection this was running well but when this redirected (nameserver) to another server my subdomain is not opening.But another which related with "www" is opening well.I am getting an error

" Network - DNS Lookup Error The address de开发者_运维技巧lh.mydomain.com cannot be found."

What is shoud to do. I have written my htaccess code is like

RewriteCond %{HTTP_HOST} ^subdomain.example.com$ RewriteRule (.*) /subdomain/$1 [L] Thanks

delh.sliceindia.com does not appear to exist, as far as the DNS system is concerned. Have you properly configured the sliceindia.com zone to have an A record for the delh host? Or a wildcard on the parent sliceindia.com? Either you haven't, or it's not propagated yet. Either way, the redirect can't work if there's no HTTP hits coming into the server.