I have bought a Wireless ADSL Router, DSL-604+, and plugged and played! Everything was doing well as long as I had only one laptop wired to it. Nothing was strange or bad about its performance. Then I added two more PCs using two D-link Air Wireless USB adaptor, DWL-122. I configured those two PCs perfectly with DNS and IP addresses configured to be obtained automatically. Unfortunately a new kind of problem emerged out of the box! When I was connected and the other PCs were not connect...