Hi, I have just moved in with my partner who has a PC as the main household computer. The modem connected to this PC has wireless capabilities, so we tried to pick up the signal on my Macbook. After some stuffing around, we've managed to make it work, and my built-in AirPort is picking its signal up and tells me that it's a strong connection. However, when i open firefox, safari and mail they tell me im not connected to the internet? I'm sorry if thats a scattered descrpition of my problem, but it's the best I can do. any suggestions would be greatly appreciated.