Mac G-5 , Aol And Linksys Problems


We have had our Wireless-G Cable Gateway modem/router/USB/4 port switch using Adelphia high-speed ethernet for about 2 years and have had no problems. We had 4 IBM computers running on it. The problem began when we brought home the new G-5 imac running Mac OS X version 10.4.2. When Safari is launched we are getting the interenet. When I try to run AOL application it will not connect. It gives the message that "unable to completely connect to AOL please try to re-install AOL or shut down the computer and re-start. I have re-installed AOL 4 different times to no avail.
Why am I unable to run the AOL application???? Also, when I go to
Safari and access AOL page if I try to run a news video using Quicktime, the computer will not run Quicktime. Please help, this is my husbands computer and he is lossing trust with MAC
Welcome to the forum!
You are connected to the internet with wireless with a router. What applications from AOL are you trying to use?