Every time I use my iMac to chat with people on skype and QQ(Chinese chat program), I am constantly disconnected over and over and over. Another issue is that often my messages fail to deliver to my friends. It is very frustrating. This NEVER happens when I use my PC, which I can't use now since I need a new hard drive for it. Anyway, are there any Mac experts on here that can please help me out with this???