I have this wireless device (an Airport Express) that I tried to set up (with the help of a friend who knows computers better than I do), and it wouldn't work (it operates on a different frequency?). I started my computer one day and it prompted me to set up Airport Express. I went through the steps and at the end it said it couldn't be done (no surprise)...but in the process it changed my settings so now my wireless internet doesn't work. It says my computer settings don't match the network requirements. How do I get to the screen where I reset those settings? I have my password and all that... To any smart techy type who can help me... Thank you!!!