I am having the same exact problem on my Mac. Seems like it use to work perfect until the last few weeks. I even tried it on my PC and got the same result. No firewalls, no virus programs on either my Mac or PC, there are no ports blocked on my router. I can log in and after a couple seconds it will connect and show ##TB available, then all the sudden it goes disconnected and wont connect again. Once in a while it will connect to one but have just a few MB's avaiable, or there wont be any connections in the screen. I have installed and reinstalled this program a dozen times on both machines and I get the same result. Running Mac OS 10.1.5, 10.2, 9.2.2 and Windows Me on the PC. All the same. Kazaa on my PC runs perfect.