domain mapping using plugin and creating the right DNS issues


My main site is and the sub-directory I am having another domain name mapped to is The domain being mapped to that subdirectory is

What I can't seem to figure out is the correct DNS settings/Nameservers etc. to use to actually make this work and be able to map the domain.

When I try to map the domain I get this (see attachment).

But I'm pretty sure the problem lies in my DNS settings. The domain name is hosted by GoDaddy and I use BlueHost. So I guess my question is what are the correct DNS/Nameservers I need to set up (in detail please) in order to direct a domain name to a sub-directory.

Thanks so much!