I have a Toshiba R150 laptop pc and set up wireless connection at home and works correctly. I also use it at various locations without any issues. Recently, I encountered failure connection in two locations where are at our suppliers. The first one was that I could not connect to the AP with given password. I went together with my colleagues who worked with the AP without issue. Yesterday, I visited another supplier who had an AP without any password. My colleagues worked very well except me. I could connect the AP but my computer always said my IP was same as others and failed to work properly. I have no cure how to diagnostic it and trace the cause. Can someone advise me how to track down the issues.