I have a problem with my computer. I just bought a Centrino notebook and plug it into my office network. The notebook OS is Win XP SP2. I've a very strange problem here, all of computers in my network can see my computer, but mine sometimes can see others sometimes don't. I can have an access of internet from my server, but the strangest thing is that I can't connect to any of computer seen in my network, although to all of shared folders. I also can't print anything from shared printer. All of computers in my network only connected through simple hub. I don't have this problem before with my old notebook. All remain same, cable, position, etc; only difference is in notebook. Can you help me to solve this problem?