We have a pretty new iMac with 10.6.1. We live in a campground & our internet connection comes wirelessly from an office about 100-150 yards away. The signal is strong. However, we lose our ability to operate on the internet a lot (more lately than when we first got the computer). If I look on the "Network Diagnostics" window, while I'm having problems, the ISP, Internet, and Server buttons will be red. Then, they'll cycle over into green. Then they'll go red again. Sometimes the Network Settings button will be red too. On days like this, even if the connection is all green, it's terribly slow. I know this is kind of a hodge-podge of info - does anyone have any idea what could be going on & how to fix it? Thanks.