Change to bridged or nat (with nat you have to change ips and network) and try it.
Isn't there any other option? I am following the official VMWare 6.0 lab course and that could mess up my current environment config. What I can do is change IP addresses, but I don't know what good can that do.
I'm seriously planning about replacing Win2012 servers with Win2008. They will consume less resources and probably give me less headaches.