I have a completely reverse problem to this... I have the same router(Nokia siemens 1600), my wireless connection is working perfectly in the laptop, but not the wired one in my desktop having XP2 (in fact, both wired and wireless work in my laptop having windows 7). I cant even access 192.168.1.1 on my PC. I didnt got any driver CD or manual with the router. The guy who came configured it in my laptop, and said no special settings will be required to run it in PC. And now, I have called him a thousand times, he says I'll come this day, I'll come that day(not unexpected though, thats BSNL). Can anyone please Help me????