Unable to Connect.

I have set the realm list to

set realmlist logon.warmane.com
set patchlist logon.warmane.com

yet im still getting unable to connect error when trying to log in to the warmane server.

Try downloading Warmane launcher if you had an old one from some other server.

where we can download that launcher?

There's a big download button right on the webpage.. https://www.warmane.com/download