need some urgent help

Hi all i have installed PWs, PHP and MySQL it works great, i can see my scripts running in my browser typing localhost, i belioeve that if i have my PWS running the just typing my ip in the browser should work, well it doesn't, i signed up with dns2go.com there you have a first level domain or secondary levele domain directed to your dynamic ip, so i sent a ping to my domain and my ip responded, but the webserver didn't show anything on the browser, so i changed to apache and the story is the same, i'm conected through cable conecion, if anyone can help me that would be great Thanks Xytras