small problem

i am trying to use nmap with windows for the first time in my life. i have takin all the steps on your site to try and work the bugs on my Windows Xp System.... here is the problem

Starting nmap V. 3.00 ( www.insecure.org/nmap )
Note: Host seems down. If it is really up, but blocking our ping probes, try -P0
Nmap run completed -- 1 IP address (0 hosts up) scanned in 3 seconds

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this is the output i get from all scanned ip/domain names
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i have installed Winpcap, Windows Network Moniter Driver Protocol, And the nmap_performance registration entries.
my eventvwr seems to have no output for Nmap
i would like some help 
please get back to me when you have some free time, im sure your a busy person
Thank You, 
BLAZON
a.k.a. 
Zim