I'm new here, and I hope I'm posting in the right place. When I use nmap -A -P0 ip, I get:

starting nmap 3.81 (http://insecure.org/nmap) at 2005-7-19 12:19 Eastern Daylight Time

..then nothing happens. Am I doing something wrong, or is it just taking a long time?

Im on a 2.2ghz Windows Xp box, running SP1 (5.1 - 2600), on broadband cable connection (4mb)