No, I am talking about this:
http://download.oracle.com/docs/cd/E....htm#NTDBI2715

The fact you are asking about using the localhost IP address is suggestive that you didn't follow the instructions in the installation guide. Look in ORACLE_HOME. Do you see a folder named something like (not these numbers, just the fact there is an IP address in the name) 10.211.55.6_orcl? (assuming your database is named orcl).

If you see this folder, how does that IP address compare to your current address? Willing to bet they are different.