My Compaq V3000 has wireless

Question

My Compaq V3000 has wireless Internet capabilities which worked with no problem for a long time. I used it in lots of different locations and found I always had to got into something to adjust for wherever I was. All of a sudden, when I try to get to my wireless router at home, it is asking for a network and will not make any connections to any internet within range. How can I reset the wireless application so that it goes back to accepting my router?