hi everybody i was installing zimbra in a virtual machine with ubuntu 10.04 and this happned

DNS ERROR resolving
It is suggested that the hostname be resolveable via DNS
Re-Enter hostname [Yes] n

i put this ip addres because im using vmware

i don know what to do i mean there is a way to resolve this problems somekind of "resolving DNS in zimbra for dummies"?
what i ned to do?