I just purchased a new iMac, running 10.4.11 I was able to let it connect to my wi-fi network, but airport constantly freezes when in a program such as safari or even downloading. If I am in safari, the progress bar moves about 1 inch then stops. to continue my internet session i must turn off airport, the turn it back on. It works for a few more min then will freeze again. Any ideas. I have other units on the network and have no issues.