Can't Fu***ng Download

I'm a Newbie. I have a Dell P4, 512MB 2.1Ghz and a cable connection. The LimeWare icon at the bottom left corner displays a firewall even after I uninstalled McAfee Firewall and turned my Windows XP Firewall Protection off. What gives? Further, the connection status meter at the bottom left corner only shows 3 greens. I followed Lee Evans instructions from his post but the end result is that I STILL cannot download after tweeking this for the past 2 hours. Even if I attempt to download from someone with a T1 connection and 4 stars, I still keep getting that "need more sources" message. WTF do I do now????????

[Grandpa]

Are you using a router if you are it may be firewalled

[ultracross]

your isp could also be filtering p2p usage. i cant remember where that port test is. im tired, so i guess you can search for it yourself.