How can I be a "four stars sharer"?
 

Before I installed Apple's AirPort (or maybe it was the upgrade to OS 10.1.5 that did it?), I had a lot of uploads every time I was online. But now there are very few. I have asked people uploading from me (chatting) how many stars that appears for my host in Limewire, and they usually say "three" (only one time I had four). I have deactivated the firewall, and in my computer's Preferences panel > Sharing > Firewall I have also marked the Gnutella/Limewire button to force the firewall. What can I do to be a four stars sharer again?