Seems a tad strong to issue a warning of this ilk prior to discovering who or what is causing your problem.
However, I take it you have the green lights and have reconfigured the connection in setup (on AOLs opening screen).
If so and it's still no go then did you set up your wireless client to a stage where it asked for a network name. At this point you need to enter the 570's ssid which is printed on the bottom of the router. After you get through to the completion stage press the red button for 10 seconds and all should be well if all other instructions have been followed.
If a warning is required it is that setting these things up is not as simple as we are sometimes led to believe, and that I believe is true of all networking.